Alfagrog Filter Media E40 15L Pure Aquatics 500 Marine mount the block below the

mount the block below the water surface and provide medium flow around it

Condensed design redirects water flow up

Stretchable

mount the blocks beneath the water surface in the sump in a very low flow area

one for the front and one for the side

Alfagrog Filter Media E40 15L Pure Aquatics 500 Marine mount the block below theWhat is Alfagrog? Alfagrog is a porous foamed ceramic material, which is lightweight, strong and inert. It's high surface area makes it the natural choice for colonisation by micro organisms in biological filtration systems resulting in cleaner water. Benefits of Alfagrog over other filter media: Extremely high surface area Highly porous Inert, pH neutral Lightweight Available worldwide Economical 40mm The Alfagrog range of porous ceramic filter media