Rice Reef's 120 SPS Reef Tank

[gregzz4]

Originally Posted by Rice Reef

May try some GFO if the water changes are not working.

Wayne, if you do go the GFO route, keep in mind that a rapid removal of PO4 can upset your SPS, so do it gradually over a couple/few months
Ie; first month 10ml/10g, second month 15-20ml/10g, then you can move onto 25ml/10g from there
FWIW - I use 250ml each 4 weeks on my 110g system