kinda frustrated acro experts wanted

[MIKE NY]

I have some corals that grow like weeds and others that I have for a couple of years that just stay as frags and literally do nothing even moving them around every few months...don't know why...

 

[vio]

If it was my tank I would pull off the bio pellets. I think you may be overdoing it with the carbon source. IMO you're stripping the water too much.

Are you using gfo?

+1 also ......."and a 15w aqua ultra violet sterilizer" .
I hope u not running Zeolite, I will check the Potassium any way, I like Salifert Test, Red sea is a big pain.

 

[Master Shake]

the 15w sterilizer was on the old 90 the 120 has a 25w, my next thought was to take the pellets off and try it for a bit without them, i dont run zeolite or gfo, i had the issue with the acros before i added the pellets but for all i know i could have solved the other issue and the biopellets is the new problem. dont think il take all them off initialy but maybe take half of them out to start, if i see a difference then il take them all off