Active Aqua Grow Flow Ebb and Gro Controller w/ 2 Pumps

Yes, this is the controller unit only. You'll need to purchase Active Aqua Grow Flow expansion kits or individual grow modules (2-gallon or 5-gallon buckets) separately. For a complete package, consider the Active Aqua Grow Flow 12 Site Ebb & Flow System, which includes everything you need to get started. The controller can manage up to 48 two-gallon modules or 24 five-gallon modules.

The controller uses timed cycles to pump nutrient solution from the 7-gallon reservoir into your grow buckets (flood phase). After a set time, the solution drains back into the controller reservoir (drain phase). This cycle provides roots with nutrients, water, and oxygen, promoting healthy growth. This method differs from other hydroponic techniques, such as the Active Aqua Root Spa 8 Bucket Deep Water Culture System, where roots are continuously submerged.

The Grasslin timer is a premium mechanical timer that controls your flood and drain cycles. You can set multiple on/off periods throughout the day by pushing down pins on the timer dial. Most growers run 2-4 flood cycles per day, with each cycle lasting 15-30 minutes depending on plant size and growth stage.

The controller features float switches and an emergency shut-off valve. If the system detects potential overflow conditions (such as a clogged drain or malfunctioning pump), it automatically shuts down to prevent water damage to your grow space.

While it's technically possible, we don't recommend mixing module sizes on the same controller. The different bucket volumes will fill and drain at different rates, making it difficult to optimize your flood cycles. For best results, use all 2-gallon or all 5-gallon modules with each controller.

The controller has a 7-gallon capacity, but you'll want a much larger external reservoir to supply it. A good rule of thumb is 2-3 gallons per plant minimum. For a system with 24 plants, plan on a 50-75 gallon reservoir. Larger reservoirs, such as the Active Aqua 55 Gallon Drum with Locking Lid, provide more stable pH and nutrient levels.

Use the adjustable level ladder inside the controller bucket to set your desired fill height. This controls how high the water rises in your grow buckets during each flood cycle. Start with a lower level for young plants and increase as they grow and develop larger root systems.

Clean the controller bucket, pumps, and float switches between growing cycles using mild hydrogen peroxide or diluted bleach solution. Check pump intake screens regularly for debris, and inspect all tubing connections for leaks. For total grow room automation, this controller can be paired with environmental controllers or an Active Aqua 1/2 HP Chiller with Power Boost to maintain ideal nutrient temperatures.