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Pond Water Quality

Water quality refers to both the water's ability to sustain the different life forms in the pond as well as the clarity of the water so that we can see and enjoy those life forms.

Water Quality for Fish

In the wild, where fish live in large ponds, waste products such as ammonia and nitrites are sufficiently diluted. In backyard ponds, however, these toxins will become concentrated to levels that are dangerous for your fish without filtering. Be careful not to add more fish than your pond can support. Fancy goldfish can survive well in small ponds but Japanese koi require much larger ponds. Establishing a biological filtering system with beneficial bacteria is a very effective way of keeping ammonia and nitrite levels in check but it takes time, patience and careful monitoring.

Algae Control

To keep the water clear and beautiful, you'll need to control algae growth. Keep in mind that green velvet algae, which grows on the sides of ponds, is very good for fish because it provides oxygen and acts as a food source. There are several ways you can control suspended algae in your pond depending on whether you experience chronic or sporadic algae problems and what types of algae are giving you trouble. Consult a pond expert or comprehensive book for guidance.

Water Clarity

Keeping the water clear is a priority for most pond keepers. For the best clarity, prevent run-off into the pond, shade part of ponds that are completely in full sun to discourage algae growth and introduce only one fish per square foot of pond surface area.