Ideal for raising brine shrimp, microalgae, phytoplankton, rotifers and more. Their semiclear, .04" polymer fiberglass construction allows 90% light transmission Lightweight, corrosionproof tanks are also used for trickle filters and stripping towers. The conical bottom tanks are fitted with a 2" FNPT bottom hole and can be supported by bricks around the edge. All tanks are handmade; therefore, measurements are approximate and may vary. Ship from factory and have additional crating charges—allow 2–3 weeks. Made in USA.