Flood + Drain Systems (2 sizes - Complete Kit)

What is the Flood + Drain System and how does it work?

It’s an ebb & flow hydroponic system that floods the root zone on a timer, then drains back into the reservoir. As it drains, it pulls fresh oxygen into the roots. This cycle supports healthy growth and reduces watering guesswork—ideal for beginners and experienced growers alike.

What’s included with the Flood + Drain System?

The system includes the tray/planter, pump, fittings, returns, and a reservoir. You supply the growing media and pots (if using). Two sizes are available: 170 x 62 cm (narrow) and 118 x 108 cm (square). Check your tent or bench measurements to confirm fit.

Can I use pots or fill the whole tray with clay pebbles?

Yes. You can place pots filled with coco, soil, or rockwool in the tray, or fill the entire tray with clay pebbles for a single large bed. Just rinse clay pebbles thoroughly before use to avoid clogs or sediment buildup.

How often should I flood the system and how long should each cycle last?

Start with short, infrequent floods and adjust based on plant size and environment. Each flood should soak the root zone without oversaturating the top layer. Use a timer to automate consistent cycles and avoid overwatering—especially early in the grow.

Does the Flood + Drain System need to be level?

Yes. A level tray ensures even flooding and proper draining. Pooling or incomplete draining usually means the unit isn’t level or a return is blocked. An optional overflow/standpipe helps control flood height and prevents overfilling.

What kind of pump and plumbing setup does it use?

The included pump is matched to the system. You can upgrade later, but more flow isn’t always better. Use filters to prevent clogs, and check fittings and gaskets for leaks. Avoid overtightening or misaligning connections.

How should I care for the reservoir and nutrient solution?

Keep the reservoir cool, clean, and dark. Use an air stone if needed to improve oxygenation. Monitor pH and EC regularly. Top up as needed and change the solution periodically—especially if it smells off or becomes unstable.

How do I clean and maintain the system between runs?

Drain all water, scrub the tray and reservoir, and sanitize using a light bleach or hydrogen peroxide solution. Rinse thoroughly. During the grow, check for blockages, inspect fittings, and clean any algae or debris buildup.

Can I use this system for seedlings, clones, or just as a runoff tray?

Yes. For small plants, reduce flood frequency to avoid overwatering. It also works as a runoff catch tray if you’re not using flood cycles. Once setup is tested, it can run unattended—but always monitor early to avoid issues.

How do I prevent algae or root oxygen issues in the system?

Limit standing water, avoid overflooding, and shield wet surfaces from light. Poor oxygenation can come from warm water, dirty reservoirs, or overly frequent flooding. Beneficial microbes can help, but keep the system clean to support them.