The Mag-Float Replacement Extra Large Pad/Felt 501 is for the Mag-Float 500. The Pad/Felt 501 contains one algae pad and one felt pad (for the exterior side). For glass aquariums only.
The Mag-Float Replacement Extra Large Pad/Felt 501 is for the Mag-Float 500. The Pad/Felt 501 contains one algae pad and one felt pad (for the exterior side). For glass aquariums only.
