Algae will brown up within 48 hours after treatment of Crystal Plex Algae Control.
According to the manufacturer, Crystal Plex Algae Control is not meant to be used in pools. If you were to do so, the chemical reaction between the two will cause the water in the pool to turn to an ugly red color.
Algae will brown up within 48 hours after treatment of Crystal Plex Algae Control, if applied correctly.
Crystal Plex Algae Control is labeled to help control Filamentous, Chara and Planktonic algae it will not harm plants when used as directed. If you are trying to control pond weeds, you can take a look at Diquat Water Weed and Landscape Herbicide to see if this fits your needs, we recommend to review the product label for application instructions.
According to the manufacturer for a 300 gallon pond with fish (not trout or koi) you will use a total of ¼ oz (1.5 tsp) of Crystal Plex Algae Control. When there are fish in a pond you want to only treat ½ of the pond at a time, so 1/8 oz( ¾ of a tsp) in half and then 5 days later you should treat the other half with the other 1/8 oz (¾ of a tsp) of product.