Just wondering what is the best way to reduce phosphates in the reef aquarium. I have always used GFO but it gets used up quickly and it can be pricey. If I buy the 5 micron filter socks and dose Blue Life phosphate Rx instead in small doses is this safer and more economical. My phosphates on the Hanna ULR read around 0.1 ppm. I just do not want to kill off fish or corals by using the Lanthum Chloride which I heard can happen. I am sure these cases may have been due to lowering the levels too fast which is not my plan.