Parameters are as follows.
daytime pH 8.2
nighttime pH ? (This is a maintenance account in a dentists office)
dKH 10
Ammonia 0
Nitirite 0
Nitrate 5-10
Magnesium 1450
Lighting 6 bulk t5 with (2 blue +, 2 purple+, 2 coral+)
PAR at zoanthids (~300)
Other photosynthetic animals
10 inch derasa
Hollywood stunner chalice
Wellsophylia green
Kenya tree
Sarcophyton toadstool
Green Star polyps
Green torch
Purple and green hammer
Candy caulastrea
Various mushrooms
Green bubble coral
Small rose bubble tip anemone
Fish and inverts
Scarlet hermits 10
Astrea snails 10
Small purple tang
Pair neon gobies
Red honey chromis 10
Trio true percs
Trio lamarks angels
Heraldi angel
Skunk cleaner shrimp 2
Blood red cleaner 2
Tank is 150 gallon flat back hex. Dual sump with skimmer and calcium reactor all made by Bermuda Aquatics. Flow by to hydor koralia about 1500 gph each.
Hope this helps. Seemed very strange to me all around. Haven't seen any potential predators, but that doesn't mean they aren't there. Zoas do this sometimes for a week or so for no apparent reason, but this has been almost 3 weeks now and still like this.
Someone suggested adding a wrasse to eradicate any nudibranchs. What type? I use six lines a lot in my personal and maintenance accounts for planarian control would they work?
Going to try to catch dwarf angels out, especially heraldi. Haven't seen it eat at them, just browse algae and stuff on rocks, but he is the likely vertebrate culprit if this is the issue.
Thanks for all the help.