First off Welcome to AquariumAdvice.com
A couple off issues I see right off the top. Your temp is rather low for these types of animals. Over the next week or so very slowly raise that up to about 78-80Â°. It will make a difference. The saiinity is also on the lower side but if just fish you could get away with that. Since you have inverts, I would strongly recommend raising the salinity to 35 ppt
). Only raise it 0.001 each day though. Too quickly on either change will stress the animals..
of 8.0 is unto itself not that bad but if tested later in the day is a bit low. When testing ph
it's a good idea to test midway through the tanks photoperiod to get an accurate average. You can also check it in the AM before the lights come on, midday and just before the lights go off to guage how the ph
raises through out the day in reaction to increased O2
production from algaes.
Understandabley you are aware of the implications with large fish in a small tank, so we'll set that aside but the wrasse may also be feeling a bit cramped. Wrasses are increadibley active fish and really do not fair well in smaller environments. Could also be "first day" jitters. Are the other fish showing any form of aggression?