I started awhile back on my 55 gallon Mbuna and at the time I only had a yellow lab and black convict. After finishing my tank I decided to add three other species to my tank: Blue Cobalt, Cobue and Chewere. I spent so much time and then money on these fish and now I only have one cobalt blue who is very large and quite happy with and three mixed breeds (someone had fry but I never figured out who, they all have stripes like the convict and chewere but are all too young for color yet.) I was so beyond disappointed in my species endeavor that I haven't gotten anymore in my tank besides a placo... I fed them NLS cichlid formula and they all loved it. My most recent loss was my very last Chewere and he was a big guy! Probably almost 4 inches or so. I've tested my water I've always been in normal ranges and I even bumped up my canister filter for more power since I still battle with diatoms and poop on laying on my sand. I'm just feeling very discouraged and have even considered just tearing my tank down... Does anyone have any suggestions or help or explanation in what happened to all my fish friends? I'd like to get more and have a little more color in my tank but I don't want to lose them all like I did before.