First of all, the water used by parent fish can't be fresh tap water, and it must be "intercepted". Trapped water means exposing fresh tap water to the sun for several days, at least three hours. Then adjust the water temperature to about 25 degrees, which is suitable for parent fish.
I don't know what kind of feed the fish shop owner gave you. It's better to have a fishy smell. Feeding a feed for a long time will definitely lead to incomplete nutrition. You can dry it with cooked egg yolk (don't touch oil) and feed it alternately, so that the nutrition is more comprehensive. You should throw less food and don't feed too much, or you will die. Feed it three times a day. You can feed the egg yolk in the morning and at noon.
Eat at night
Also, you need to change the water for it every 3-4 days. Remember to leave two-thirds of the old water when changing water. If the water is clean, fish will be healthy. If you don't have much time to change water, you'd better buy a water demon (usually around 8 yuan) to cultivate nitrifying bacteria and keep the water clean.
I told you all my personal experiences. I wish your fish more healthy and healthy, and I wish you success in raising fish! !