NT Labs ProCare Algae Sponge, Aquarium Cleaning Water Feature Pond Window Each Pack Contains 3 Sponges.

Amazon

【 ALGAE REMOVAL SPONGE 】: Algae spoils the appearance of your aquarium, water feature, and pond windows. ProCare Algae Sponges have been designed to safely and easily remove unsightly algae from your aquarium/pond. 【 FREE FROM DETERGENT & SOAP 】: ProCare Algae Sponges are free from detergents and soaps which can be toxic to aquatic life. These sponges are safe for internal aquarium/pond use! 【 CLEANS ALGAE FROM SCRATCHES 】: The flexible material that ProCare Algae Sponges are made from means they successfully remove algae from deep inside any scratches in glass. 【 EASY TO USE】: Algae Sponges have been designed to be the ideal size for cleaning algae from your aquarium/pond. The form of the sponges means they are excellent for tackling corners and are they are the ideal size to reach tight spaces within your aquarium/pond. 【 SUITABLE FOR ALL AQUARISTS 】: The ease of use of NT Labs Algae Sponge means they are perfect for use by beginners and seasoned aquarists alike.

Cazaar

NT Labs ProCare Algae Sponges (pack of 3) Algae spoils the appearance of your aquarium, water feature, and pond windows, ProCare Algae Sponges have been designed to safely and easily remove unsightly algae from your aquarium/pond. These sponges are safe for use on glass and acrylic, and are safe for use with all aquatic life. Removes algae from scratches No detergents or soaps Pack of 3 sponges