The Ebb & Gro (comes with 12 planters and is expandable to 48+) is the most versatile ebb & flow system on the market. With many growers going from large numbers of small plants to fewer, larger ones, the Ebb & Gro fits the bill! It is a simple system that uses 2 pumps and gravity to flood and drain the planters about 3 or 4 times per day. Please note that this is an oversized item and ships via truck frieght,average shipping time is 21 days, if you need this quicker, please contact our office for a price quote.