login
Menu
Aqua Scapes of CT
Aqua Scapes of CT
Hide

Store Location & Hours

Mon to Fri: 8am - 5pmSat: 9am - 5pmSun: 9am - 3pm

Store Directions

Photo Gallery

Check out photos of our latest installs and other water garden content.

Photo Gallery

Pond Foam: What Does It Mean? | Aqua Scapes of CT

Pond Foam: What Does It Mean?

There are a few reasons a pond might become foamy. Although often harmless, it is important to monitor any build up of foam on the surface of your pond as it can require immediate maintenance for ponds with fish.

Fish Breeding

Are your fish more active than normal? Are your smaller fish chasing around your larger fish? Does your pond smell...fishy? If that's the case, your fish are most likely spawning. This usually happens from May to July. When spawning, fish expel gases (ie ammonia) which creates foam on the pond's surface (it is also responsible for the fishy smell). If this is the case, a 25% water change is recommended. We also suggest adding a water conditioner, or detoxifier, to remove chlorine, neutralize ammonia, and detoxify heavy metals that can harm pond fish. Increasing the pond's aeration and adding carbon/charcoal are also beneficial.

Environmental Circumstances

It is common to get surface foam on your pond in spring. If your pond is under a flowering tree or surrounded by flowering shrubs, the pollen generated from these plants can cause an increase in surface foam. This foam will usually subside within a few weeks, but may require multiple water changes if the foam continues. Although I'm unsure of the science behind this, I speak from experience. Our barn pond always foams up when the cherry tree above it blooms. The foam always recedes after the cherry drops it's flowers and leafs out.

Other Causes

Has your lawn been fertilized recently? Have you applied any pesticides/insecticides near your pond? Does your dog swim in your pond (esp after having flea meds applied)? All these chemicals can leach into your pond and wreak havoc on your pond/fish. A telltale sign of these chemicals is a foamy pond and stagnant/gasping/clamped fish. In this case, it is imperative that you replace 100% of the pond's water. Clean all filter material, add fresh carbon/charcoal, continue boosting aeration, and monitor the fish closely. Adding a detoxifier is also crucial.

Pond Foam: What Does It Mean?Pond Foam: What Does It Mean?

austinfoosePost (2022)1505 Views

Comments (0)



More advice (20)

Growing LotusTips and Tricks for a Happy PondHow We Build a PondLotus vs Water Lilies - They Are Not The Same!How To Winterize My Pond?How Do I Find a Leak in My Pond?Why is My Pond is Green?Should I Clean My Pond Every Year?Do I Have Too Many Fish?How Deep Should My Pond Be?Predators Keep Eating My Fish. What Should I Do?Koi or Goldfish?Pond Plants 101: How to Plant Your PondShould I Install a UV Filter in My Pond?Pond Foam: What Does It Mean?Sick Koi: What Should I Do?Can You Put Turtles in Your Koi Pond?How To Build a Pond by AquascapeHow To Build a Pondless WaterfallHow to Install a Landscape Fountain Kit

Previous adviceNext advice