Hi all. I have a 12.5 Fluval Edge with 5 platies, five neons, two black neons, three rasboras, two glofish, and a blue ram. Pretty mellow fish. I’ve introduced some shrimp into the mix, because I just like them, and I understand they’re a good cleanup crew. The tank is planted, with rock features and wood that give crevices and hideouts for shrimp to hang out in. I’ve added red cherry, blue velvet, Amanos, and a rainbow shrimp. Water seems to be right up the middle: Ph is usually 7-7.5, GH and KH are a little on the low side but not anemic. But I keep finding dead cherry shrimp. I know the platies are 24/7 eating machines; could they have killed shrimp in competition for food? Or could it be my water changes? I pull out about 20% every two weeks. Or could it be my water changing method? (Ive don’t that slam-the-siphon-in technique to get the flow started - could a concussion wave from that kill an invertebrate?) Just looking for ideas here...thanks!