Sounds like you need to up your water changes with that level of stocking in a 225. Might also want to spend a few dollars and get yourself a good liquid water test kit. Get your water sample and then do a water change ASAP!
Yeah I've been slacking filtration is fx6 and eheim pro series 2. Doing 50% when I get home and I did have one but it ran out of drops lol gonna get one today
U just add drift wood then this occur then I would say thenph have drop abit. Adding drift wood will drop the ph abit add in some coral chip n do water change hope that will help
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