rowaphos help

[FitoPharmer]

I suggest if you are really interested or worried, buy a PO4 colorimeter, test, and add media based on those results. If your PO4 is really high start with a 1/10 of the suggested amount for your tank and slowly move up from there. You are correct in thinking using to much GFO or phosrowa at the beginning has the potential to shock your system. But that is based upon how high or low your current phosphate levels are. Or just play it safe and slowly add more to your reactor until you reach the recommended amount without testing. Do you have bad algae problems now? or is your tank relatively algae free?