Active Aqua Grow Flow 2.0 Expansion Kit w/six 5 gal Square PotsActive Aqua Grow Flow 2. 0 expansion kit is highly compatible with Grow Flow Ebb and Gro Controller unit. It comes with six 5 gallon square pots and is compatible with Grow Flow Ebb and Gro Controller. Buy this kit to expand your ebb and flow system up to 48 sites on a single unit. Centered Drain: Each pot comes with centered inch fittings that reduce standing water by allowing proper drainage. Unique Design: This expansion kit comes with a heavy duty