That is definitely very cheap compared to using Rowaphos... and thanks bro for sharing this piece of information... I have 1 question though, if you are already using Rowaphos, how come your tank PO4 can still be at 0.3/0.5? And yes, once you bring PO4 down to almost undetectable level... the corals will open big
Just wondering what went wrong with your most expensive investment (Rowaphos)... you run a FR? Or just put them inside stocking?