Frogspawn keep melting... Help

[Junmity]

Salinity is 1.023

I just bought a calcium reactor to try to bring it up

but i've been dosing twice a week with reefbuilder.

The strange thing is, i have two frogspawn that are pretty healthy since the beginning.

when i add zoa's they do usually close up for a couple days to a week before the fully open and start getting good colour.