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Nice DIY check valve
Use clear outdoor spray paint, it will be cheaper and last longer then what I used.
great idea, wish I seen this sooner
www.sciencedaily.com/releases/2011/05/110516181337..."A third of all the 83 plastic products and synthetic chemicals that were tested released substances that were acutely toxic to the water fleas, despite the leaching being mild.""Examples of plastic polymers made from the most hazardous chemicals are certain polyurethanes, polyacrylonitriles, PVC, epoxy and certain styrene copolymers."I used PVC in mine too, but will not be using it in the future, or any other plastic.
Nice setup, the way battery prices are going the lead battery will to costly to buy. Nice to know LifePO4 can be used.