gsm not happy anymore

[spider1218]

i have two colonies of gsm that have been doing well for over a year. that over the last few weeks they have been loosing ground and not opening much anymore.

parameters are 0 nitrates or nitrites, phosphates .03, calcium 420-440, mag at 1350, alk 9.0 sg 1.025

tankspecs 90 gal tank with 175w 14k x2 and pc 96w actinic and 32watts led blues. filtration is 10gal refugium with cheato and a large skimmer

started using gfo about 6 weeks ago when my phoshates started rising(.12) and go a lot of gha. also stated using one gallon of kalk mix in 5 gallons of rodi for top off.

 

[ninja66999]

add beneficial bacteria to help a lil, also fuel by aqua vitro does a great job of helping corals put... also whats the temp?

 

[spider1218]

temp is 80 but i don't think a bacteria is going to help. it is a old tank 2 plus years and it was growing for over a year. there are lots of zoe collenys as well as other softys. and one sps along with a favia and favites all donig great. I'm wondering if its the gfo.