The Mag-Float Replacement Extra Large Pad/Felt 511 is for the Mag-Float 510A. The Pad/Felt 511 contains one algae pad and one felt pad (for the exterior side).
The Mag-Float Replacement Extra Large Pad/Felt 511 is for the Mag-Float 510A. The Pad/Felt 511 contains one algae pad and one felt pad (for the exterior side).