Anyone made the jump from DWC to RDWC?

Running a 4-bucket DWC setup right now in a 4x4, and i keep the water temps at 68F, EC around 1.4-1.8 depending on stage, pH locked at 5.8-6.0. It works, but managing four buckets individually is tedious. Checking and adjusting each reservoir separately means small variances between buckets, and that bugs me from a consistency standpoint. I've been looking at converting to a recirculating system with a central reservoir. The appeal is obvious - one point of nutrient management, easier EC and pH stability across all sites. But i've also read that if one plant gets root rot, it spreads to the whole system fast. That's not a small risk. Anyone here actually run both setups and can give me a real comparison? Specifically curious about how much your EC stability improved, whether you saw yield differences, and how you handled the root zone disease risk. Running Gorilla Glue last run and GDP before that, both pushed around 1.8 EC by week 4 of flower without any tip burn issues, so i have a decent baseline to compare against.

2 comments

2 Comments

Experienced1d ago

The root rot spread thing is real but honestly people treat it like a death sentence and its not. Good water temps, Hydroguard or similar, and decent dissolved oxygen and you barely think about it. I ran standalone DWC for years before going RDWC and the disease risk did not meaningfully go up once i dialed in those three things. What nobody mentions is the flip side of that "one point of management" benefit -- one point of failure too. Pump goes down at night, timer glitch, res sprouts algae from a light leak, now your whole canopy is stressed instead of one bucket. With individual buckets you get natural isolation. I've had one bucket go sideways mid-run and just pulled that plant, the other three finished fine. For flavor and terp expression i actually think the slightly more variable individual bucket approach can be interesting during late flower when you're dialing back nutrients. You can back off certain plants more aggressively than others based on what each one is telling you. In RDWC you're feeding the system not the plant. If consistency and scale are the goal, RDWC makes total sense. But if you're pheno hunting or running different cuts with different appetites, that centralized res can work against you.

Expert Grower1d ago

The "feeding the system not the plant" point is real, but i'd push back slightly on framing that as a DWC advantage -- in my experience the bucket-to-bucket variance in standalone is more noise than signal. You think you're dialing in plant 3 independently, but you're also fighting pH drift and temp differences between buckets that muddy the read. The control feels granular but it's not always clean data.