Active Aqua Grow Flow Expansion Outer Bucket Only, 2 gal

A Matched Outer Bucket for 2-Gallon Modules

This 2-gallon outer bucket lets you expand or repair an existing Active Aqua Grow Flow system by replacing or adding just the outer half of a module, without buying a full new bucket pair.

It pairs directly with the matching inner bucket already in your system, keeping the drain and aeration design consistent across every growing site.

Key Features & Benefits

• Sized for 2-gallon modules — matches the standard Active Aqua Grow Flow bucket dimensions.
• Centered drain fitting — minimizes standing water at the base of the bucket.
• Aeration channel design — supports root health throughout the growing cycle.
• Holds about 13 liters of medium — sized for clay pebbles or a similar growing media.

Who Should Use This Bucket

Growers expanding a Grow Flow system one site at a time, or replacing a single damaged bucket without needing to purchase an entirely new module pair.

About Active Aqua Grow Flow

Active Aqua Grow Flow is Hydrofarm's bucket-based ebb and flow hardware line, and this outer bucket is sold separately so growers can repair or expand one half of a 2-gallon module at a time.

Frequently Asked Questions

Does this bucket come as a complete module?

No, this is the outer bucket only; pair it with an inner bucket to form a full module. Buying just the half you need saves cost when only one side is damaged.

What size medium does this bucket hold?

It holds approximately 13 liters of clay pebbles or a similar growing medium. That capacity matches the standard 2-gallon Grow Flow module.

Will this fit my existing Grow Flow system?

Yes, it is sized to match standard 2-gallon Active Aqua Grow Flow modules. Confirm you're replacing or expanding a 2-gallon module rather than a 5-gallon one before ordering.

Why use a centered drain fitting?

It minimizes standing water at the bottom of the bucket, which helps protect root health. Standing water around roots is a common cause of root rot in bucket systems.

How do I use this to add a new growing site?

Pair it with a matching inner bucket to form a complete module, then connect it to your controller using standard Grow Flow fittings. Added modules count toward your controller's maximum site capacity.