1" Diameter Siphon Rake Attachment
Use this rake attachment on your siphon to remove detritus and other polluting organics from your gravel. Having build up of waste in a low waste tank can lead to algae growth and other water column ailments.
I had bad case of hair algae in my active substrate tank with two duel-sponge filters and after the cleaning the gravel this way and removing as much algae as I could, my hair algae never came back.
Video of it in action: