New guy here. I used to be a large scale breeder (@40 years ago) for African Cichlids & did killifish on the side because I enjoyed them so much. I had my basement in New England converted to a fish room with an air blower which powered the sponge filters that were in "every tank". Also had daylight lighting on timers and a controlled room temp. Multiple cultures going all the time to feed fry. O2 tanks for shipping fish. Needless to say I barely made enough to support my addiction. The military, constantly moving put an end to my hobby/business. Now I have been out of the hobby since 1990 and have most likely forgotten quite a bit and I'm sure there is a lot of new technology I know nothing about. Retired now and preparing to buy a 90 gallon tank to enjoy now that I am retired. Planning on doing some South American Cichlids as I've never done these before. Currently looking at Geo Redhead Tapajo, Electric Blue Acara, Gymnogeophagus balzanii. I am going to need a lot of help and advice. Looking forward to ideas and advice. Thanks Bob.