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Why do I have foam on my pond? | Decorative Ponds & Water Gardens Q & A

Why do I have foam on my pond?

Q: Why do I have foam on my pond?

Dom – Bellingham, WA

A: Foamy pond? No, the neighborhood kid (hopefully!) hasn’t dumped dish soap into your water garden or fish pond. The bubbly white or gray stuff you’re seeing on your pond’s surface is actually being caused by high levels of organic material in your pond. It’s natural – but it indicates an out-of-balance problem in your pond.

Question Your Water Quality

Foam forms when excess organic material has accumulated in your water garden. This happens when too many fish are living in the pond, you’re overfeeding them, you have inadequate filtration or there’s runoff flowing into the water.

When this nutrient-laden water pours down your waterfall, the air and water collide, causing the proteins and other organics to be trapped inside bubbles rather than turning into ammonia and nitrites. That air-water collision is why the foam seems to form at the base of your waterfall.

Tips for Removing Foam

So how do you get rid of the white frothy stuff? You can remove the foam in several different ways:

1. Use a defoaming product: A temporary solution is to dissolve the foam with a fish- and plant-safe defoamer, like Pond Logic® Defoam™. You simply shake the can and pour its contents into the water. The foam will disappear in no time.

2. Do a partial water change: To reduce the overall amount of organic material in your pond, you should drain the pond halfway or so and add fresh water and the defoamer. This will remove some of the organic material, dilute what remains and prevent foam from forming.

3. Reduce your fish population: Too many fish will produce excess waste, which means more foam. Remember that the rule is to allow 1 inch of adult fish per square foot of surface area – so if you have too many koi or goldfish in your pond, you might want to think about finding new homes for some of your finned friends.

4. Feed the right amount: If you’re feeding your fish too much, the excess food adds to the extra organic material in your pond’s water. Only feed your fish an amount they’ll gobble down in a few minutes.

5. Beef up your filtration system: A more powerful filtration system will remove those excess organics, so if you really want to erase foam, think about going bigger with your filter.

If you do suspect the neighborhood kids have dumped soap into your pond, your fish could be in danger. Do a water 90 percent water change before chasing the perpetrators down.

Pond Talk: Do you notice whether foam forms more often during certain times of year?

Pond Logic® Defoam™ - Eliminate Unsightly Pond Foam

How Many Fish Should I Put In My Pond? | Decorative Ponds & Water Gardens Q & A

How many fish should I put in my pond?

Q: How many fish should I put in my pond?

Grady – Nevis, MN

A: The general rule for stocking your pond is 1” of fish for every one square foot of surface area, but of course there are exceptions to every rule. First and foremost, don’t forget to leave room for your pond fish to grow. Stocking your pond with 10 one-inch fish may be fine for now, but what about next year when your pond fish have doubled or tripled in size?

Additionally, larger pond fish produce exponentially more waste than smaller fish so you need to factor this into your plans. Look at the chart below for an example of what I mean. One 6” fish produces 3.3 times more waste than one 4” fish and 26 times more waste than one 2” fish. In general, it’s probably best not to stock your pond to the max right away. As your pond is more established and you add better aeration and filtration, your pond will be able to handle more fish.

There are a variety of koi fish packages to choose from when you are ready to get started.

Fish Length Fish Waste (Grams/24 Hours)
1″ .10
2″ .75
3″ 2.43
4″ 5.80
5″ 11.32
6″ 19.55

Pond Talk: Do you find that your fish are cozy or crowded?

Koi fish direct to your door. Premium koi packages

What Can I Do To Maintain My Pond This Season? | Decorative Ponds & Water Gardens Q & A

Can sidewalk salt be used to melt the ice off my pond?

This will be our first full season with our pond. What should we do for proper maintenance?

Joe – Aurora, CO

The first season with your new pond can be an exciting and relatively hassle free endeavor, as long as you take the right precautions to maintain it properly. Lucky for you, you’ve come to the right place to learn exactly what you’ll need in order to successfully maintain your pond for the season.

Remember, a balanced ecosystem is key. Listed below are the main elements used to maintain a balanced pond.

Filtration – Whether you have a waterfall, pressurized or gravity type filter, make sure the included Filter Media is clean and in good condition. Mechanical filtration like skimmer filters should be cleaned regularly to prevent clogging. Biological filter media, like the pads in your waterfall or bio-media in your pressurized filter, should be cleaned sparingly to promote an accumulation of water-filtering beneficial bacteria.

Fish – The highlight of many ponds, fish add color and life to your decorative pond. They also, however, add waste and nutrients that can quickly accumulate and unbalance your pond. 1-inch of fish for every square foot of surface area is a rough guideline for maximum fish load. Keep in mind that your fish are continually growing. That means your 3 inch fish that were added last year are now 4-6 inch fish which more than doubles the waste that needs to be filtered. The more fish you have and the frequency at which you feed them plays a large role in how much filtration you will need to remove this additional waste.

PlantsAquatic Plants are an enormous natural boon to your water garden or fish pond. Not only do they provide habitat for your fish, maintaining 40-60% plant coverage shades your pond and prevents dramatic increases in water temperature on sunny days. Plants also provide additional natural filtration as they extract nutrients from the water added by organic debris and fish waste.

Aeration – Proper aeration is another key factor for pond maintenance. An aeration kit like the Pond Logic® PondAir™ or KoiAir™ will provide extra circulation to keep debris from accumulating at the bottom of the pond while increasing oxygen levels for your fish and water-filtering aerobic bacteria.

Natural Pond Treatments – Natural products like those contained in the Pond Logic® DefensePAC® will greatly increase water quality by boosting aerobic bacteria counts, binding up phosphates from organic material and eliminating organic debris.

Including each of these key pond elements in your water garden or fish pond greatly reduces stress and guesswork associated with a troublesome unbalanced pond. Simply put, a stable ecosystem means less work on your part. If a problem does arise, you can then pinpoint and adjust whichever element above that is throwing your pond out of balance.

Pond Talk: Is your pond balanced? If not, have you discovered which of the key elements is missing or lacking?

Pond Filtration Media

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