Supreme phosphate control is made simple with the ingenious Pura PhosLock from Magnavore. This handy product is made from ferric hydroxide; which permanently binds phosphates; rendering them completely harmless in your aquarium; and terminating algae problems. Phoslock is five to ten times more effective than other forms of phosphate control; and it is safer for your livestock too. Great for use in all applications; including power filters; canister filters; wet/dry filters & sumps; and media reactors. For more information on controlling phosphates; please see our article How to Get Rid of Algae and our That Fish Blog post: Phosphates ï ½ Invisible Troublemakers in Ponds and Aquariums.