How many are fish allowed in a 15 liter tank?

Today one of my fish died. I don't know if it's because of the PH or the temperature. Help!

What fish can live to be over 100?

I just bought a fish tank not even a few months ago and I cleaned it all out when my fish batch of fish died and then I put m...

Like how do I clean out all the fish poop out of gravel on the bottom of a fish tank?

I have 2 fish in my fish tank, (not salt water) my filter stopped working, what can I do? Do I move them from that tank and p...

how many white baby fish does white molly have?

I have 5 tiger fish one large orange parrot fish and one small white parrot fish three molly fish one angel fish,,are they c...

please I need one I have two sharks that get up to 18 inches long and all I have is a 10 gallon

I have a 55 gallon tank with an oscar. what other fish could I put in the tank? I had a jack dempsey in their, but the osca...

I have a freshwater fish tank, and all of them like to hover in this spot at the top of the heater. I don't know if that's wh...