My lfs only had a 75gallon bag of pure blue. I run a 40gal AIO barebottom. So like 32 gallons. Will I be over treating if I put this in. I havent found a definite answer after searching for a little bit. Thanks for advice
I doubt it. Unless you have very low Po4 I would not worry. I think it is mostly high cap carbon. Plus some resin that absorbs impurities which Po4 could be one of them.