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21 CFR 801
Neutral pH of around 7
even more so if the you drill the cover for tubing connections and/or cut out a port for adding nutrients
compacted roots
Tests clean
Active Aqua Grow Flow 5 gal System w/Controller Unit & 3/4" Tubing BZB5L 21 CFR 801Active Aqua's Grow Flow is the most efficient ebb & flow system on the market. With the Grow Flow's easy to program controller unit, you can pretty much "set it and forget it." And since your pumps are only pumping a short time each day, the system is extremely reliable and efficient. Just set the fill and drain cycles, and the controller unit does the rest! As for safety, the Grow Flow is the only unit available with fail safe overflow protection. If