The Growrilla RDWC PRO : the professional 50 mm high-flow line
The RDWC PRO is Growrilla's second hydroponic line, designed for experienced growers and semi-industrial production. It keeps all the fundamentals of the RDWC 2.0 (black-and-white double-wall buckets, continuous recirculation, properly sized air and water pumps) while upgrading the fitting size from 32 mm to 50 mm. This single change, combined with more powerful pumps and an inline filter, multiplies the hydraulic flow of the circuit and makes it possible to run larger or more oxygen-demanding setups.
The PRO also adds a float valve built into the controller bucket, which automatically keeps the water level steady when you connect an external reservoir or a 98 or 157 litre flexible tank. It is the must-have option as soon as you grow for several weeks without daily intervention.
💧 Design and operation
The PRO controller bucket houses the EDEN 135 TB water pump, capable of delivering up to 2,000 L/h depending on head height. The nutrient solution leaves the controller, passes through an inline filter that traps particles and loose roots, then spreads to the grow buckets through a 50 mm push-fit network. Each bucket constantly receives filtered, ultra-oxygenated water, and the solution flows back to the controller by gravity.
Oxygenation is handled by the V30 30 L/min air pump, feeding 50 x 50 mm cylindrical air stones in every bucket. The airflow is roughly twice that of the RDWC 2.0, which translates into a more stable dissolved-oxygen level, especially useful during flowering or in summer when solution temperatures rise.
The buckets keep the Growrilla signature : 19 L capacity, double wall with a black interior and white exterior, heavy-duty 14 cm net pot included. The whole circuit can be dismantled and reconfigured without tools thanks to the push-fit fittings.
How to choose the right configuration
The RDWC PRO comes in nine configurations, to be chosen according to your floor space and target production level. The 3 in-line and 4-bucket formats fit inside an 80 x 100 cm hobby tent and let you try the PRO range before investing bigger. The 6, 8 and 9-bucket formats are sized for 120 x 120 cm grow boxes, the most common in indoor growing.
The 12-bucket comes in two layouts : 3 rows (an elongated shape of roughly 300 x 60 cm, ideal along a wall) or 4 rows (a square 200 x 200 cm shape that maximises floor density). The 16, 18 and 24-bucket systems move into semi-professional production : plan a dedicated room of 250 to 350 cm per side, good ventilation and a direct water connection for refills.
⚙️ Technical specifications
- System type : professional recirculating RDWC, 50 mm push-fit, inline filter and float valve
- Grow bucket : 19 L, black-and-white double wall, 30 cm diameter, 33 cm height
- Net pot : 14 cm (5.5 inches) heavy duty, 1 per grow bucket
- Water pump : EDEN 135 TB, 300 to 2,000 L/h flow, ~20 W
- Air pump : V30, 30 L/min flow, ~25 W
- Diffusers : 50 x 50 mm cylindrical air stones, 1 per bucket
- Inline filter : built into the circuit, removable for cleaning
- Float valve : built into the controller, compatible with an external reservoir
- Fittings : 50 mm push-fit, tool-free assembly, removable
- Voltage : 220 to 240 V AC, 50 to 60 Hz, standard European plug
- Total power draw : around 45 W (air pump + water pump)
- Country of origin : Italy, Growrilla workshop in Robassomero (Turin)
- Warranty : 2-year manufacturer warranty, pumps included
🔧 Installation and maintenance
Installation : unpack and check the parts (buckets, controller, inline filter, float valve, 50 mm fittings, pumps, silicone tubing, net pots, air stones). Place the system on a flat, stable surface, near a power outlet and a water supply if you use an external reservoir. Connect the buckets to the controller with the 50 mm push-fit fittings, install the inline filter on the water pump outlet, then place the air stones in each bucket. Fill with water, ideally reverse-osmosis or low in limescale, adjust the pH to 5.8 and the EC according to the growth stage. Both pumps run continuously.
Weekly maintenance : check the EC and pH, adjust if needed, inspect the inline filter and clean it if the flow drops. Do a full water change every 10 to 14 days to limit salt build-up.
Mistakes to avoid : never run the pumps dry (the EDEN pump seizes within minutes), do not ignore the inline filter (a partial clog is enough to unbalance the water supply to the farthest buckets), do not overdose nutrients. During prolonged summer heat, plan for a chiller or cool the room to keep the solution below 22 degrees.
Disassembly and storage : between two cycles, take apart the push-fit fittings, rinse the circuit with clean water and diluted hydrogen peroxide, dry completely and store the buckets stacked in a dry place. The PRO's modularity lets you go from a 6-bucket to a 12-bucket format simply by ordering the extensions.
🌱 Why choose the RDWC PRO over the 2.0
The PRO makes sense as soon as you need higher hydraulic flow, grow species with high oxygen demand (tomatoes in full flowering, large pepper plants) or want to run production over a large area without a bottleneck in the circuit. Going from 32 mm to 50 mm roughly triples the pipe cross-section, and therefore the return flow : buckets far from the controller receive as much solution as the nearby ones, which is not always the case on a large 2.0.
The inline filter protects the water pump and drastically reduces weekly maintenance. The float valve makes it possible to couple an external reservoir : you can leave for a week without having to top up manually. And the whole system is still made in Italy, covered by a 2-year manufacturer warranty, with after-sales service handled directly by Univers-Aquaponie from France.
RDWC PRO vs RDWC 2.0 : the concrete differences
On the hydraulic side, the PRO delivers around 2,000 L/h versus 650 L/h on the 2.0, three times more. On the oxygenation side, the PRO's V30 pushes 30 L/min of air versus 14 L/min, twice as much. On the equipment side, the PRO adds an inline filter and a float valve that the 2.0 does not have. On the price side, the PRO costs about 30 to 50 percent more for an equivalent configuration. For a beginner or hobby grow, the 2.0 remains the most sensible choice. For semi-industrial production, plants with large root masses or a setup you do not want to watch every day, the PRO is the investment that pays for itself quickly.
