From their site: BlueLife Marine has been working on their Clear Fx Pro, and they have released it at Reefstock. The Blue Life Clear Pro is a mixture of both premium Carbon and Premium GFO keeping Phosphates and organic waste in check. The 450ml Blue Life Clear FX will retail for 20 bucks and treats up to 120 gallons, and the 225ml container for retails for 14 bucks treating 60 gallons. Since the GFO and Carbon are mixed the filter media is best run passively versus a reactor since the particle will naturally separate, but the media can be run either way. Here's a summation by my favorite chemist Randy Holmes Farley: I do not know what that product is other than what I read, and what I read is that it is a mixture of GFO and GAC. That may not be true, but the material sounds like and looks like a mixture of GAC and large particle or polymer coated GFO. Some types of GFO are pellets, and some are plastic coated spheres. This one sounds like a coated or large particle GFO, of which there are several brands. Such products may or may not be better (or worse) than ordinary GFO, but they have been around a while. It also sounds like it has another polymer in it. It isn't clear what these are exactly, but they may be like Purigen or a polyfilter. This might be a fine product, but again, I'd rather use individual products with known properties and be able to control the individual amounts relative to my tank needs. For example, ROX GAC and pellet GFO (what I currently use). I can adjust the relative amounts of each independently.