This is not what I read. I have several of my friends that are running the all in one there water is 0 phosphate and 0 nitrate , they don't run any other rectors. Plus this is a relitevly new product that came out not long ago they spend 4 years developing it so I'm pretty sure it's not releasing gfo into the tank. The biopelets get eaten up all you need to do is top off the biopelets



