limari
Aquarium Advice Newbie
Hi! I have a 45g cycled tank, lightly stocked with gold pristella tetras, danios and a small school (7) of panda corys. The substrate I have now is medium-sized gravel. It's really not good for my corys, so I'd like to change out the substrate to a smaller, rounded gravel: bigger than sand, but much smaller than the gravel I have currently. My question is, how can I change out the substrate without crashing my cycle and stressing out my fish? Any suggestions/methods would be greatly appreciated!