Review on Efficient Aquarium Phosphate Remover: D-D Rowahos Delivers Crystal Clear Water by Amber Fox

This stuff was very helpful in stopping the seaweed outbreak in my 34 gallon cube with 20 gallon pan. Ammonia, nitrite and nitrate were 0 and phosphate was barely above 0. I don't have a phosphate test so all I can say is that the color is slightly off the 0ppm reading. The next gradient is 5 ppm. Place this substance in the bag provided and hang it on the outlet of my skimmer. After about a week, the brown algae were gone.