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Why is my water foamy? | Decorative Ponds & Water Gardens Q & A

Q: Why is my water foamy?

Q: Why is my water foamy?

Luke- Belen, NM

A: Is foamy water making your pond look more like the inside of a washing machine than an aquatic oasis? All that bubbly white or gray buildup is likely being caused by an excess of organic material in the water.

Accumulation happens when too many fish are living in the pond, you’re overfeeding them, filtration is inadequate or there’s runoff seeping into your water garden. Then, as the water flows down your waterfall, air and water collide, causing the proteins and other organics to be trapped inside bubbles rather than turning into ammonia and nitrites. Air-water collision is why the foam forms, particularly the base of your waterfall.

What’s the solution?

Short-term, you can change out part of the pond’s water to remove the foam. When you do, be sure to add some Pond Logic® Stress Reducer PLUS to the fresh water, which will form a beneficial slime coat on your fish and make tap water safe for them. In addition, add Pond Logic® Defoam™ to your water. Safe for fish, plants and wildlife, you simply shake the can and pour its contents into the pond. The foam will disappear in no time.

Long-term, you have several options:

  • Increase Filtration: Boost your filtration by adding plants to your pond or increasing the capacity of your existing filtration system.
  • Relocate Fish: Too many fish will produce excess waste, which means more foam. 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 them.
  • Cut Back on Meals: If you’re feeding your fish too much or too often, the excess food adds to the extra organic material in your pond’s water. Only feed your fish an amount they’ll eat in a few minutes.
  • Add Nutrient-Eating Bacteria: To help break down the nutrient load in the water, add beneficial bacteria in such as, LiquidClear™ to work. They digest the dead organics in the pond, making the water crystal clear and foam free.
  • Aerate the Water: Aeration will also help reduce the nutrient load by circulating the water column and feeding fresh oxygen to the busy bacteria.

Foamy water can be a nuisance, but once you achieve some balance in your pond’s ecosystem, those bubbles will disappear in no time.

Pond Talk: If you have to reduce the fish population in your pond, how do you find new homes for them?

Eliminate Unsightly Pond Foam - Pond Logic(r) Defoam(tm)

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

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