1. The result of this calculation is a baseline number of the carbon dioxide in your pond. Fish, plant and microbe respiration can increase the level of carbon dioxide especially during or following an algae crash, when sediment is disturbed (harvest event) or fish mortality.
1. Be sure to use salt that has neither iodine nor anti-caking agents because these are very toxic to fish.
2. It is optimal to maintain a 10:1 (chloride:nitrite) ratio to prevent brown blood disease.
1. Treating over the maximum dose/rate is toxic to fish.
2. Biological Oxygen Demand (BOD): moderate to heavy treatments will kill algae bloom, zooplankton, weak fish, among others. Your ponds oxygen demand will increase; keep additional aeration on standby.
3. The use of copper products at alkalinity below 20 mg/L are not recommended.
1. The minimum treatment rate is 3 mg/L.
2. The goal is to have the purple color persist for at least 20 minutes.
3. The higher the organic load in your pond, the more potassium you must add to obtain a good result.
4. Potassium permanganate in concentrations greater than 2 ppm can be toxic to fish if the organic content of the water is low.
1. 15-25 mg/L is recommended indefinite treatment for ponds.
2. Chemical Oxygen Demand (COD): for every 5 mg/L formalin the oxygen concentration is reduced by 1 mg/L; keep your aerators running during treatment.
3. Biological Oxygen Demand (BOD): this treatment will kill algae bloom, zooplankton, and weak fish. Your pond's oxygen demand will increase; keep additional aeration on standby.