I have a 75gal tank with 26gal sump, DSB , 80lb LR Protein skimmer also and a jewel moray eel, miniatus grouper, 12 Mexican turbo snails. They can be messy eaters and I need a good cleanup crew. I have kept Linkia stars in a reef set-up before without problems, hopefully the aggressive stars are easier to care for. my water is ammon 0, nitrites 0, nitrates 0.2 ppm(mg/L), ph 8.3, phosphate <0.05(mg/L), spec gravity 1.023 I always use RO water too. Just a note, I know the tank is small for the fish but I have a bigger tank that is empty waiting for them.