Click to expand Tap to zoom GrowoniX R/O Membrane for the XLP/GX1000 by Growonix Sold out $328.05 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out GrowoniX reverse osmosis membranes are hand rolled American made, most reliable, and high performing reverse osmosis elements in the world. Advanced membrane manufacturing technology processes ensure superior quality and unbeatable performance.