Review on Efficient Aquarium Phosphate Remover: D-D Rowahos Delivers Crystal Clear Water by Sandy Vaughn

I found this medium difficult to use. It's very fine-grained, so it's harder to get a flow rate on a reactor than on other media; too high a flow blows GFO out of the reactor. Starting up the reactor (BRS reactor) from top to bottom led to the medium sticking. The sachet (included in 100ml and 250ml sizes) is very dense (like a felt filter sock) and clogs too quickly to be useful. However, ROWAphos removed more PO4 than the BRS HC environment, which I've switched to now.