Pond Boss Forums GENERAL QUESTIONS Water chemistry Phoslock

Reduction of changing even the balance of nutrients can have noticeable changes in the type of plants that will grow. You may notice water color changes next spring and summer. Watch for changes of color and water clarity and then respond accordingly. Certain bluegreen planktonic algae blooms are responding to a lack of nitrogen with phosphorus still present. Add nitrogen and bluegreen will often be replaced by more beneficial green algae. Nutrient tests of dissolved Phos and nitrate will indicate when one is too low and governing the algae balance. For the best nutrient balance you want at least 20 nitrates to 1 dissolved phosphorus. 30:1 or 40:1 is better. It is best to test for dissolved or soluable P not total P.