Man if you are using 1/2 or 3/4inch tubing....the absolute best stuff i have come across is the stuff Greentrees uses for the their ebb&flow system. Shitty part is i think they stopped selling the 1/2 though as i only see the 3/4 now. Maybe then can still special order if you call though?
EDIT: https://www.hydroponics.net/i/135398
looks like they are making it hard to find the 3/4 now too.....might need to stock up just in case.
EDIT: https://www.hydroponics.net/i/135398
looks like they are making it hard to find the 3/4 now too.....might need to stock up just in case.
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