I know it's bad. I had been keeping Africans in a 55 gal but recently a disaster wiped out all my tank save one mature female morrii that seems very unhappy since her tankmates of four years have died. oh and the pleco survived as well. I have crushed coral in the bottom of the tank with built up limestone caves so the water is hard and the ph is high - not 8 though. Today I went to the pet shop intending to get some electric yellows but my son found a spotted puffer. From what I knew of them I thought it might be fine in a less aggressive african tank such as i like to keep with a little more freshwater salt that I usually use. But the more I've read up the more I think I need to go totally brackish for this species... is that right? I mean do I have to use the marine salt and all? I like him but I've always kept africans, is there a happy medium of water conditions that I can keep both africans and the puffer. If not then I might go totally brackish but I don't see many cool brackish species that can be kept with puffers and won't outgrow a 55. Can you all just list the species that you have successfully kept with puffers over a long period and also the water conditions that you have kept them happy in over long periods. I might just get some rays and get rid of my last african and pleco but I would be sad to see them go...