## We just purchased a house and it has a backyard swimming pond. How do we measure it? | Ponds & Lakes Q&A

Q: We just purchased a house and it has a backyard swimming pond. How do we measure it?

Rob – Hawthorne, FL

A: Surface area and pond depth are important measurements to know. They’ll help you determine dosage rates with chemicals like algaecide. They’ll help you calculate the right-size aeration system for your pond. And they’ll help you figure out how many and what types of fish to stock.

Finding those magic numbers isn’t difficult – but it does require some tools, the right equation and a little bit of work. Before you head out to your pond, grab a rope marked at 1-foot increments, a weight that’s heavy enough to sink to the bottom, and something for notetaking.

Calculating Surface Area

The easiest ponds to measure are those that resemble a rectangle, but you can figure out the surface area of a circular, triangular or odd-shaped pond, too. First, you’ll need to measure (with your marked rope) or pace off (one step is about 3 feet) some specific distances, depending on the shape of your pond. Then, plug those numbers into one of these formulas:

• Square/rectangle: Calculate length and width; L x W = Surface Area
• Circle: Calculate radius; Pi x R2 , or 3.14 x R x R = Surface Area
• Triangle: Calculate base and height; (0.5 x B) x H = Surface Area
• Odd-shaped: Use a handy online tool like Bing Maps to measure the pond. Online tools may be easiest, especially for irregularly shaped ponds.

To determine how many acres your pond is, you’ll then divide that surface area figure by 43,560 (one acre).

Calculating Depth

Figuring out your pond’s depth is a bit trickier, particularly if you have plant shelves or if the pond has a slope. Grab your marked string, the weight, something to write with, and a boat or canoe. Then, head out to the pond and follow these directions:

1. Securely attach the weight to one end of your string.
2. Climb aboard your boat or canoe with your weighted string and note-taking materials in hand.
3. Travel to at least five points in various areas your pond, more if your pond is particularly large.
4. Drop the weight into the water and note where you feel it hit the bottom. Repeat until you’ve gone to all the different spots and gathered a good sampling of your pond’s depth.

Why They’re Important

Now that you know your pond’s size, why are those calculations important?

You’ll need the numbers to determine dosage rates on chemical products like those found in Pond Logic® ClearPAC® PLUS. If the pond has been around more than three to five years, chances are good that you’ll need to address problems like muck accumulation and string algae growth in the spring.

Those numbers will also help you select the right-size Aquastream™ Fountain and Airmax® Aeration System. For instance, if your pond is less than 6 feet deep, our Shallow Water Series™ Aeration System is a good choice; if your pond is greater than 6 feet deep, our Pond Series™ Aeration System is the one for you.

Since you’ll be able to calculate how many acres your pond is, you’ll also be able to determine what types of fish you can have and how many of them you can keep. Finally, because you’ll know the various depths of your pond, you’ll be able to stake out safe swimming areas for children – but don’t forget to put out your life ring!

Pond Talk: What swimming pond maintenance tips can you offer to this new homeowner?

## Can Aquatic Weeds Go Dormant? | Ponds & Lakes Q&A

Q: Can Aquatic Weeds Go Dormant?

Jackie – Kalamazoo, MI

A: Yes, those insidious aquatic weeds can go dormant in the cold season, lying in wait in your lake’s muck and sediment, until spring when the hours of sunlight and temperatures increase. The good news is that you can battle them – even in their overwintering state. Here’s how.

Growth Patterns

When temperatures drop and the sun hovers lower in the sky, you’ll start to see those aquatic weeds retreat and hole up for the winter. The duration of their dormancy will depend on where you live (the weed growth patterns in a California pond, for instance, will differ from those in a Minnesota pond!). But, in general, you can expect to see different pond weeds disappear and reappear at different times of year based on environmental temperatures.

If your pond or lake freezes over, the perennial weeds will typically die back in the winter and re-emerge in the spring. Some plants, however, will continue to grow throughout the cold season, though at a much slower rate than you’d see in the warmer summer months.

Controlling Winter Weeds

Because you’ll probably see little to no greenery growing, it will be a challenge to control winter weeds. Methods that work in the spring and summer – like treating with temperature-sensitive herbicides and algaecides – won’t work in the colder temperatures. So what can you do? Here’s what we recommend:

• Remove Weeds: If there’s no ice on your pond, you can pull on your hip waders and manually remove the weeds with a Weed Raker. This go-to tool efficiently pulls out aquatic weeds by their roots, slowing their regrowth, and also removes decaying matter.
• Pond Dye: Pond Dye, available in convenient liquid quarts, will shade the water blue or black and reduce the amount of sunlight reaching the weeds and algae growing at the bottom of your lake. Less sunlight means fewer weeds, regardless of the temperature or time of year.
• Aerate the Water: If you’re not using your lake as an ice rink, crank on your Airmax® Aeration System. The action created by the aerator will circulate the water and reduce the muck buildup throughout the winter.
• Feeding Fish: Your fish will enter into a semi-dormant state when the water dips below 50 degrees, so there’s no need to feed them. Doing so will add to the lake’s nutrient load (i.e. weed fertilizer …), which is not what you want to do.

If wintertime weeds are taking over your pond, consider trying some of these time-tested tricks. They’ll minimize the nuisance growth during the cold season and reduce the amount of work you’ll need to do in the spring.

Pond Talk: How do you handle aquatic weeds in the wintertime?

## We just bought a house with a half-acre pond. Where do we start?| Ponds & Lakes Q&A

Q: We just bought a house with a half-acre pond. Where do we start?

Hans – Brandon, MS

A: Some home buyers look for granite countertops or in-house movie theaters – but a half-acre pond is an amenity that makes us giddy! Because you likely don’t know the history of the pond, how it was built or how it was maintained, it’s best to give that new pond a complete rehab from the bottom up so you can use it to its full potential.

Here’s a five-step process that will make the job easy:

1. Assess the Pond’s Condition. Before you begin rehabbing your pond, take some time to examine it, including measuring its size and depth, identifying weeds and beneficial aquatic plants, checking for fish, and inspecting pre-existing structures like a dock or an aeration system. These details will help you as you get your new pond back into shape.
2. Give It an Oxygen Boost. Your real work begins with installing a bottom-diffused aeration system, like one of the Airmax® Aeration Systems. The units, which include a diffuser, compressor and airline, circulate oxygen throughout the water column so that it’s readily utilized by critters living in your pond, including fish, frogs and beneficial bacteria. It also helps remove harmful gases from the water. If your pond already has an aeration system, thoroughly inspect all its parts and tune them up as necessary.
3. Control Weed Growth. Treat prolific growth of aquatic weeds and algae. Invasive plants like cattails, chara, phragmites, bulrush, watermilfoil and even out-of-control water lilies can become real problems in a closed ecosystem. Depending on your situation, you may need to use an herbicide and/or algaecide to get them under control before they take over and negatively impact your water quality. For help, check out our Weed Control Guide, which can help you ID and choose the right remedy for the weed.
4. Remove Unwanted Vegetation. Before and after you treat the weeds and algae, mechanically remove growing and dead vegetation with a Weed Razer™ and Weed Raker™. If you don’t pull that growth out of the water, it will break down into detritus and pond muck, which will actually fertilize the weeds and algae you’re trying to eliminate!
5. Do Your Maintenance Chores. Now that your pond is on its way to being clean, clear and usable, keep it that way by maintaining it with beneficial bacteria and pond dye. Beneficial bacteria, like those found in ClearPAC® PLUS Pond Care Package, will break down any residual pond muck buildup and keep the water clear. Pond dye will tint the water blue or black, preventing ultraviolet rays from reaching problem plants like algae while adding beauty to your waterscape.

With a little work, you can transform your new pond into a dramatic part of your landscape – particularly if you decide to add a decorative fountain or other feature to it. Have fun with your new aquatic playground!

Pond Talk: What advice can you share with this new pond owner?

## I’m thinking about getting an aeration system, but how do I measure my pond’s depth? | Ponds & Lakes Q&A

Q: I’m thinking about getting an aeration system, but how do I measure my pond’s depth?

Lester – Muscantine, LA

A: Measuring the depth of your pond is kind of like measuring the square footage of an unfamiliar living room in the pitch black darkness. You can’t really see what you’re doing and you don’t know what shape it is, so all you can do is follow the walls and hope for the best, right?

Same thing with measuring the depth of a pond. Unless you’ve dug it yourself, there’s no real way of knowing what underwater undulations exist along your pond’s floor. Is the bottom flat? Sloped on one side and really deep in the middle? Are there shallow nooks along the perimeter? All these factors matter. You need to calculate an accurate number that will help you choose the right-sized aeration system for your pond – because its health depends on it.

It’s not difficult to determine how deep your pond is. First, you’ll need some tools, including a tape measure, some string or chain, a weight, something to write with, and a boat or canoe. Here’s what you do with them:

1. Using your tape measure, mark a chain or knot a string in 1-foot intervals. Securely attach the weight to one end.
2. Climb aboard your boat or canoe with your weighted chain or string and note-taking materials in hand.
3. Travel to at least five points in various areas your pond, more if your pond is particularly large.
4. Drop the weight into the water and note where you feel it hit the bottom. Repeat until you’ve gone to all the different spots and gathered a good sampling of your pond’s depth.

When you’re done, write down the maximum depth and calculate the average of the measurements you took. If the maximum depth is less than 6 feet deep, the Shallow Water Series™ Aeration System is a good choice. It features an energy-efficient, dual-diaphragm compressor that delivers oxygen to the water via two self-weighted membrane diffusers.

If the maximum depth of the pond is greater than 6 feet deep, the Pond Series™ Aeration System is the one for you. It’s powerful enough to aerate ponds up to 4 acres and can be easily adapted to fit uniquely shaped ponds, thanks to its multi-plate design.

Don’t forget: If you’re not sure which Airmax® Aeration System is right for you, we can help! After you do your depth measurements, we can do an aerial mapping to determine which system is best for your pond. Call today to speak to one of our aeration experts: 866-POND-HELP (866-766-3435) or use the Web Aeration Mapping Form.

Pond Talk: Do your Father’s Day plans include some rest and relaxation by your pond or lake?

## Why should I aerate my pond? | Ponds & Lakes Q&A

Q: Why should I aerate my pond?

Marty – Crivitz, WI

A: We talk a lot about the importance of aeration in this blog – and for good reason. Aeration with the Airmax® Aeration System, which involves diffusing oxygen into the water below the surface, benefits the quality of your farm pond or lake in myriad ways, including these top five reasons:

1. Reduces Pond Muck: Aeration cuts the nutrient load, like pond muck and other decomposing debris, in your pond. How? The increased oxygen and water movement provided by aeration helps to encourage the colonization of beneficial aerobic bacteria. These bacteria are responsible for digesting and preventing muck and nutrient accumulation.
2. Boosts Oxygen Levels: Aeration also increases the amount of oxygen in your lake’s water. Beneath the water surface, the diffuser plates release tiny bubbles of oxygen. They disperse and circulate throughout the water column, providing life-sustaining O2 to beneficial bacteria, fish and submerged plants.
3. Eliminates Thermocline: Aeration circulates the water and eliminates thermocline, which is a stratified layer of water between the warmer, surface zone and the colder, deep-water zone. Bottom diffuser aeration churns and mixes those temperature layers. The tiny air bubbles force the cooler oxygen-starved water to the pond’s surface where it becomes infused up with O2. The warmer, oxygen-rich water then drops down, fueling the beneficial bacteria.
4. Improves Water Quality: By reducing the pond muck, increasing oxygen and circulating the water column, your water quality will improve. You’ll see reduced algae growth, clearer water, and happier, healthier fish.
5. Reduces Winter Fishkill: Aeration also protects your game fish in the winter. As organic debris decomposes in your pond, gases are released into the water column. These gases become trapped when your pond freezes over, which reduces the amount of clean oxygen. If enough oxygen is displaced, your fish will suffocate. Running an aerator pumps fresh O2 in the water while maintaining a hole in the ice for gas exchange.

Pond Talk: What benefits have you seen in your pond or lake after adding an aeration system?

## I bought an aeration system this year. What maintenance should I be doing? | Ponds & Lakes Q&A

Q: I bought an aeration system this year. What maintenance should I be doing?

Gary – Saginaw, MI

A: Congratulations on your purchase of an Airmax® Aeration System—and good for you for thinking about regular maintenance, which will keep it operating well for years to come. Here are some things to inspect on a routine basis:

• Check Your Cooling Fan and Pre-Filter: Regularly clean out your pre-filter and check to see that the fan is indeed operating. Hot air should be blowing out, not air being pulled in. An easy way to remember to do this is to always check your fan and shake off your pre-filter when you cut your lawn.
• Check Your Air Pressure: Check to see that your air pressure has not risen or dropped significantly. Normal operation will range between 5 and 10 psi. Also be sure to check your pressure relief valve to make sure no air is escaping.
• Check Your Air Filter: Clean and replace your air filter every three to six months, depending on your environment, and do not place a wet air filter back into the unit. For deep-water units, use the Airmax® SilentAir™ Piston Compressor Air Filter; for shallow-water units, use the Airmax® SilentAir™ LR Series Air Filter.
• Purge Your Membrane Sticks: Once per year, purge your membrane diffuser sticks. See the product manual for additional instructions.
• Use the Maintenance Kit: Finally, be sure to use your maintenance kit for the system you have installed. For shallow-water systems, use the Airmax® SilentAir™ Diaphragm Compressor Maintenance Kit every 12 months to keep your diaphragm compressor running its best. For deep-water systems, use the Pond Logic® SilentAir™ Piston Compressor Maintenance Kit every 24 months to keep your piston compressor humming.

Remember, if you have any questions, need additional information or want to read through some troubleshooting tips, refer to your product manual.

Pond Talk: What is your aerator maintenance routine? Do you have any tips to share?

## The leaves are just starting to fall..I see netting for water gardens to keep the leaves out, do they make anything like this for large ponds? | Pond & Lake Q&A

The leaves are just starting to fall..I see netting for water gardens to keep the leaves out, do they make anything like this for large ponds?

Bryan – Traverse City, MI

When fall comes around, leaves and ponds seem to have a magnetic attraction to one another. And while netting is available in essentially any size you might need, it’s a cumbersome solution for larger ponds. Simply spreading the netting over a large pond is a major undertaking – and the impracticality of installing posts throughout your pond to keep leaf-covered netting from sinking makes other solutions look much more attractive.

At The Pond Guy, we strongly recommend aeration and chemical treatments to address inevitable leaf buildup for customers with large ponds. When you browse our web site, you’ll notice a wide range of Airmax® Aeration products. These aeration systems enable the pond to break down leaves quickly and naturally by keeping pond water moving – and the entire pond well oxygenated. When coupled with the beneficial bacteria in PondClear™, EcoBoost™ and MuckAway™, fallen leaves break down in no time to keep water clear, and both fish and plants healthy.

As an added measure in the fight against falling leaves and debris, you should also consider the use of a pond rake. With the regular use of our Pond & Beach Rake, you can easily remove excessive leaves and debris in no time flat.

Pond Talk: How do you keep fall leaves from accumulating in your pond?