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Pond Water Care

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Has anyone had pond or pond-less waterfall algae concerns or any other type of water quality issues? Here is our Water Quality Information sheet that might help you understand and manage the quality of the water in your pond.

1. Algae

String Algae – Long filament stringy- sometimes reaches surface of pond and looks like green bubbly scum

Suspended Algae – Water has a green tinge or bad cases looks like pea soup


Add a bacteria product in combination with an algaecide. The bacteria prevents algae from growing by breaking down organic matter that turns into sludge or algae & by using the nutrients that the algae needs to survive.

BENEFICIAL BACTERIA – There are a lot of brands for Beneficial Bacterial, find one that is right for you and follow manufacturer initial application instructions on container. Then add bacteria weekly to maintain the balance. If you see algae starting to bloom again, start adding bacteria per initial instructions again.

ALGAECIDE- Treat the pond per instructions for your algae concern, the you may add this product weekly as a maintenance dose. Algaecides deplete oxygen from the pond so you must follow instructions closely if you have fish, and only in the recommended dose.

GreenClean Granular or EcoBlast – Use as a spot treatment on algae. It must make direct contact with the algae to kill it. You can turn off the falls and sprinkle no more than the recommended dose over the entire stream or areas that are heavily covered with algae. Let it sit at least 20 minutes then turn on the falls again. For green water algae, you can do a shock treatment with GreenClean – see container for instructions. This product is used when doing a pond clean or a shock treatment.

2. Tea Color Water

Usually caused by leaves, twigs, or mulch where the color has leached into the pond. The pond is clear, just discolored.


Use activated carbon in the pond. Be sure to put the carbon in a bag (or women’s nylon) and tightly close the top. RINSE the carbon completely so that there is no black colored water coming out and add it to the pond. You can set in directly in the pond or up in the Biofilter or tucked in the waterfall. It will take up to a week to completely take out all of the color.

3. Murky or Stirred Up Water

Water is not clear and looks as if the water has been disturbed or stirred up.


Use any type of EcoFloc to clear up the water. This product is a flocculent that binds the floating particles together and they get swept into the filter. EcoFloc will make the water very cloudy at the start, but it will begin clearing within the next 24 hours. You will need to clean your skimmer or pump filter out once after 3 days.

4. Salting a Pond if You Have Fish

It is a good idea to salt a pond. The benefits are:

It improves the fish gills ability to take in oxygen. Many parasites and diseases cannot live in salted water so the chances of the fish getting sick are minimal.You need to dose the pond salt according to the directions. Each salt has a different concentrate. Do not use iodized salt, it must be a pond salt product. Dissolve the salt in pond water and add to where the water falls into the pond. If you can’t dissolve it first, add the salt to an area where it will dissolve (Biofalls area) so that the salt chunks will not go into the pond directly. You do not want the fish to eat the salt.

Formula: Calculation formula for gallons of water in your pond: Width (feet) x Length (feet) x Depth (feet) x 7.48 = Gallons

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