Actually Dan and Nicky suggested the O2 could be depleted. She purchased a test kit, went home,tested the water.....VOILA !!!!
O2 = 0.00
Opened the lid ( tank has glass lids)
Added a couple of airstones and powerhead
Moved the Korallias towards the surface
Within 1 hours O2 started to climb. The corals are looking better but PH is still low 7.6 but is expected to climb up.
Husband currently in her carport building sump, not allowed in the house until done
She also purchased a CPR overflow since tank is not drilled.