I rotate tilapia, catfish, shrimp, silversides, krill and occasional beef heart. Feed mine once in the afternoon daily as they are only about 5 months old. Will probably switch to every other day when their growth slows down. I am jealous that you can get away with a wc once a month. Keep my tank at about 77. I hope to have the same luck as you with my shoal. Thanks for sharing.I love how they school together also no aggression. When the lights are out they spread over the whole tank. Temp is high seventies, not above 80. Food is freshwater fish. I own a restaurant so I get cases of fish at a time. So far they have eaten tilapia, catfish and baramundi. I read seafood is a no no so I stick with freshwater food. I feed fish every other day a few massivore pellets on off days. 50% water change once a month has worked so far. Tank was set up for stingrays so turnover is almost 10 times an hour very high flow. 75 gallon sump. Never test PH?