Most of my fishes (I have 26 tanks) are in my garage or a seperater room (only 4 are not here) stil, I decorated all the tanks with the same idea: the fishes ought to feel save.
The tanks for raising fry are therefore decorated with a few stones and/or some wood, near the feeding spot. Thus the fry can eat from the shelter, which helps them growing. Quite a few plants are in the tanks, for savety and biological purposes.
All tanks with breeding pairs are decorated with rocks and wood, to form territories, and hiding places. If possible I have also a few plants (looks better, one plant more or less wil not do much biologically)
I think fish who dig need to have some digging, thus none of my tanks are bare bottomed. All are filled with 40-6 cm of sand. But contrarily to Jim Jim I do not think a difference excists between keeping fishes to breed and to enjoy them are different matters: I enjopy healthy fishes, and healthy fishes reproduce.
I do not feed 4 or 5 times a day small amounts, because I have al my fishes with 2, 3 4 or 5 other cichlid species (only the fry are seperated by se-pecies) and 1 or 2 catfishes. Always one species is the fastest at the feeding place, so I better feed large quantities. This can be done a few times a day.
However, the fish breed properly, but I fdo not intend to raise many fry, but I ointend to sell the best fry - all athers are used to feed fishes.
Therefore my views to keeping fishes appear to be guite distinct from Jim Jim's