kmlong
Aquarium Advice Activist
Hello, i have a 20 gal currently. Had it for about 3 years now and it is perfectly cycled and well balanced. I've only had community tropical fish all this time but am down to my last tetra. once he goes i would like to try some semi aggressive fish like tiger barbs, etc. I really want to change the gravel though and get new artificial plants. How would i go about changing the gravel without upsetting the whole cycle of the tank? Am i going to have to start over with the cycle again? If i saved all the water and used it to fill the tank back up after the new gravel would that be enough to have the cycle pick back up? any advice on how to do this would be appreciated. I won't get the new fish till it's stable again. thanks