Cobalt Aquatics E-X-T GFO filter sponge is a handy way to pull out PO4

The Cobalt Aquatics¬†E-X-T GFO filter sponge is a new chemical filter from Cobalt Aquatics with phosphate remover built right in. Filter pads impregnated with chemical media have been around for years, but to date the mediums used have been zeolite…