Fish can not be released in 24 hours after changing all the water in the fish tank. After changing all the water, water needs to be re-raised, so it only takes a week to release fish. If there is good water in advance, after adjusting the water temperature, the fish can be put in, but after a week of rest, not only to re-cultivate bacteria, but also to stop eating oxygen, a week later, the fish can be fed, otherwise the water quality will be destroyed, the health of the fish will be threatened.
for the fish tank 1, trapped water: to change the water for the fish tank must be trapped first. Because fish farming uses tap water, which contains residual chlorine and needs to be treated by drying before it can be used for fish farming. Generally, it takes one day to dry in summer, two days in spring and autumn, and three days in winter.
2. Pumping: After preparing the water to be changed, you can start pumping. Water can be pumped by pump or siphon method, either way, it should be pumped at the bottom of the water, which can take away the residual bait and feces at the bottom, thus playing a role in maintaining water quality.
3. Water injection: After part of the old water in the fish tank is pumped out, new water can be injected. New water must not be poured in all at once, it is better to pour it slowly from the wall of the fish tank, so as not to cause fluctuations in water quality. It should be noted that the temperature of the old water and the new water should not be too different, otherwise it will stimulate the fish.
