Quote:
Originally Posted by Rice Reef
May try some GFO if the water changes are not working.
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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