Yueton Stainless Steel Aquarium Water Filter Pipe & Air Tube Hose Cleaning Brush - Flexible Double-Ended 61-Inch Brush for Fish Tank Maintenance & Accessories

This tool was a game changer for me in cleaning algae out of the tubing of my turtle tank filter. (My previous method was to twist pipe cleaners end-to-end, run it through the tubing, and hope it didn't come apart before coming out the other end.) The tool has a different size brush on each end, so it fits the flexible 5/8" tubing as well as smaller hard plastic inflow and outflow tubes. The shaft of the tool is made of tightly coiled wire that doesn't tarnish or rust. It's flexible enough to go through the curves of soft plastic tubing and firm enough to push through the hard plastic ones as well. It makes cleaning all the parts of my turtle filter much easier and faster than my previous "stone age" method.