I think the 3x1 would be good if you got dividers you would be able to keep different broods separate (if you wanted). I'm planning a 6 foot upgrade in the coming months just saving up at the moment for everything and Im planning on keeping a few groups of cichlids so expecting a few spawns in the long run and I want to do a few tanks for fry and I was thinking of a few 3x1s would do well with dividers. As most of the ones I am planning would be able to spawn in the 3ft then I can leave the eggs/fry in the breeding tank and put the parents back in the show tank.
Wills
Wills