Ponds, Aquariums, Watergardens, Fountains & Aquaculture Applications Kink-proof tubing will not restrict flow Black Corrugated Helix/Surface Black tubing “disappears” beneath the surface Inhibits algae growth Also Available in Metric Sizes Successfully tested for toxicity by an independent laboratory for use in Aquaculture Available in Oversized and Metric sizes Made of Phthalate Free PVC
