The red pond water is generally caused by too many dinoflagellates, which will appear reddish brown after a large number of algae multiply. Once this situation is found, it is necessary to use bleaching powder and other drugs to remove algae in time, because the red water caused by dinoflagellate means that the algae phase in the pond is single, so it is easy to pour algae, and the water quality will be polluted after a large number of algae die. Therefore, after algae removal, it is necessary to re-cultivate algae to promote the growth of other algae.

1. Reduce light: To avoid algae explosion, the first thing to do is to reduce light. Algae itself is a kind of plant, and its growth needs sufficient sunlight. The longer the illumination time, the easier it is to cause algae outbreak. In view of this situation, a shading net can be set up on the pond, which can have the effect of shading.

2. Put algae-eating fish: If you want to eat algae for a long time, the best way is to raise a few algae-eating fish. It should be noted that you must choose local species and don't put imported fish into the pond casually, otherwise it may break the ecological cycle and become the dominant fish species in the pond, thus affecting other fish.

3. Drug algae removal: Drug algae removal is also common, and bleaching powder, chlorine dioxide, etc. can be splashed in the whole pool. It should be noted that the dosage of algae removal must be controlled to avoid phytotoxicity and threaten the survival of fish.