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.
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Orders over $49.99 Ship FREE.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.