how can we grow fishes healthy in a fish tank?

Answer 1

By cycling the fishtank properly is the first step
http://fishlesscycling.com/articles.html

Giving them the space that is recommended and not putting any kind of fish in a bowl

By doing weekly maintanance of partial waterchanges 25% with a gravel siphon

By not overfeeding

proper filtration and heat as needed

not putting the tank near a window

keeping the light only on for 10-12 hours during the day and turning it off for 12-14 hours ant night

by conditioning the water before putting it into your tank at waterchanges

floating the fish properly in there bags before neting them into your tank






Hope that helps
good luck


EB

Answer 2

First, it's good to know what kind of fish you're looking at acquiring. I recommend tropical fish, they tend to be better beginner fish. Neons, some Barbs, Danios, etc. Once you know what type of fish, then go to how many you want. A rule of thumb is an inch of fish (at adulthood) per gallon of water. Most tropical fish only get 1-2 inches. Then get a tank setup and all the rock and extras to put in it and put it all together. Start up the filter and run the tank for a week. Leave the light on during the day, usually no more than 8-10 hours, turn it off at night. After about a week, the tank is ready for a few fish. Depending on the size, I wouldn't put more than 2-3 fish in at a time. Too many fish at one time will cause them to die. Once you add some fish, wait another week, then add a few more and so on. A good habit is changing about 25 % of the water once or twice a month, any more than that and you risk removing the good bacteria in your tank. Also, when you do a water change, don't change the filter or wash the plants at the same time, again, you could remove beneficial bacteria that your tank and fish need. Never change all the water in the tank and never use regular sops to clean anything in the tank. Buying a water testing kit helps to ensure that your tank water stays in the appropriote levels that it should be to ensure your fish are healthy and happy.