As algae grows it will "lock" up nutrients in its structure and harvesting the algae you are basically removing nutrients and other undesired chemicals from your tank

IceCap Algae Turf Scrubbers use algae as a natural water filter to remove nitrate, phosphate, and other pollutants from your aquarium water. For External Use Only Installation requires feed pump & plumbing.

With the Theiling Rollermat it will automatically unroll fresh new fleece to trap and collect free-floating debris and detritus from your aquarium.

Theiling Compact Rollermat Never Change A Filter Sock Again! Max Flow 500 GPH

SURF8 or SURF8x - built to order- floating surface 2-compartment upflow scrubber with Green Grabber surfaces - 8 cubes feeding per day

SURF4x floating surface Ribbon Scrubber® with Green Grabber® surfaces - 4 cubes feeding per day - Xtra light for higher nutrient water

Eliminate water changes. Remove nuisance algae, nitrate and phosphate. Cultivate seaweed for feeding.

Finally an aquarium filter that offers drop-in installation in the smallest of spaces, along with reduction or elimination of water changes and nuisance algae. And it's small enough to drop into the back compartment of most all-in-one aquariums

Eliminate water changes. Remove nuisance algae, nitrate and phosphate. Cultivate seaweed for feeding.

Finally an aquarium filter that offers drop-in installation in the smallest of spaces, along with reduction or elimination of water changes and nuisance algae. And it's small enough to drop into the back compartment of most all-in-one aquariums.