That is the down side to having the filtration I have for my photography, I can not keep them
I run a combination of canisters and HOB 0ver 10x the water column. As an example the 37 guppy aquarium has over 700 GPH in filtration. Except for the 150 it only has 1,420 GPH in filtration.A shame, you'd probably take great pictures of them and their fans! What filtration do you have for photography?