Hey all, I've got a red rooster waspfish that unfortunately passed away today. She was eating just fine, albiet very picky. Would only eat live ghost shrimp and very occasionally live blackworms. i fed her every two/three days and when I fed BW I'd target feed. Water params are perfectly normal. Salinity is .025 , temp is 78 on the spot consistently, 10 nitrates 0 nitrites 0 ammonia. Only things that have changed in the past two weeks were a 25% wc with a different brand of salt (went from IO RC to Tropic Marin) and addition of corals but, neither of those could've killed her as alk changes usually dont kill fish and there's no medications that would've been on the corals I added. The only guesses I've got are RDS or parasites. She wasn't acting weird though. What do you guys think?