These signs appear in aquaculture ponds before algae die-off

The signs before algae die-off are that a layer of yellow floating or oil-film-like dead algae appears in the pond, the water viscosity increases, foam is abundant and large, and it does not dissipate easily for a long time; some foam even appears rather dirty earthy yellow. It generally occurs mostly in spring, and a large amount of algae death in the pond will reduce the dissolved oxygen level of the water body, accelerate the consumption of oxygen in the water body, and thereby cause fish to suffocate from lack of oxygen.

How to prevent algae die-off?

Daily inspections should be strengthened, observing changes in the water body as well as various water quality indicators. Weather forecasts should be observed at all times to guard against extreme weather such as continuous high temperatures and heavy rain. When water transparency deteriorates and it begins to become turbid, this is the prelude to algae die-off; at this time, new water can be added, or water-purifying agents can be used for regulation, combined with bottom-modifying agents for soil improvement, to avoid algae die-off. Aerators can be run more often; when water layer separation and insufficient dissolved oxygen occur, they can provide sufficient oxygen supply.

After algae die-off occurs, attention should be paid not only to detoxification and water regulation, but also to soil improvement. First, detoxifying agents are splashed over the whole pond for anti-stress harvesting; at the same time, to avoid oxygen deficiency in the water body, aerators should be run more often, combined with chemical oxygen-increasing agents such as oxygen supplements, to avoid oxygen deficiency in the fish school. When the water source is sufficient, clean new water should be added, and algae should be cultivated again.

The above is the relevant introduction to the signs before algae die-off, and I hope it is helpful to everyone.