Phosguard

PhosGuard is a high capacity and high efficiency filtration product for removing phosphates and silicates from marine or fresh water aquaria. PhosGuard has a working capacity to remove 20 to 60 mg/L phosphate in 100 gallons with a similar impact on silicates.

Helpful hint: One of my secrets in this business is to mix 1 Marinland Carbon and 1 Phosguard in a large container. I then use that to fill my filter sock that I change twice in the 1st month and then monthly after that.{Many people test for phosphate and get a 0 on test? They then wonder why they have algae. The reason is that the algae eats all the phosphates available, like a refugium does. Thus by adding phosphate remover and carbon, the food source is gone and the algae starves} .