The shape of the choice.
Mars Hydro’s iHub strategy is the same as AC Infinity’s — sell cheap fans and lights, then sell a controller that works fluently only with their fans and lights. The price point is competitive, the marketing is glossy, and the unboxing is satisfying. The problems show up around week 3, when you realise the “smart” in “smart power strip” means basic-on-off for the dehumidifier you already own.
Smart with anything you plug in.
- Any fan, full variable speed
- Any dimmable LED, full smart dimming
- Any smart plug, full automation logic
- Industrial soil probe — EC, pH, NPK
- VPD as a genuine automation trigger, not display-only
- Web dashboard and mobile app, both responsive
- Native Home Assistant integration
- Open API, locally documented
- Stable firmware (mature, well-tested)
- Local-first, no cloud account required
Smart with Mars Hydro gear only.
- Smart features need RJ12 to Mars Hydro lights / fans
- Third-party gear: basic on/off via outlet only
- Tower fans & many equipment types simply unsupported
- Only 4 outlets, 15A total — small grows only
- VPD is display-only — cannot trigger automation
- Cannot set humidity targets directly (only via VPD presets)
- MarsPro app described as buggy — recipes vanish, errors, disconnects
- 2.4 GHz Wi-Fi only — mesh routers need workarounds
- No grow plans, no API, no web dashboard
- Cloud-dependent for data viewing
- "Released too early" — common forum complaint
Feature-by-feature, no marketing fog.
Sources: Mars Hydro iHub product page, MarsPro app reviews, Grasscity / Overgrow / RollItUp forum threads on Mars Hydro controller behaviour. Where Mars Hydro’s spec sheet says one thing and customer reports say another, we’ve gone with the customer reports.
| BudMaster Nexus | Mars Hydro iHub Pro | |
|---|---|---|
| Price & positioning | ||
| UK base price | Coming soon | ~£80 |
| Subscription | None, ever | None |
| Cloud account required | No | Yes (data viewing) |
| Equipment integration | ||
| Variable-speed fan from any brand | Yes — any fan | Mars Hydro RJ12 only |
| Smart dimming on third-party LED | Yes — any dimmable driver | Mars Hydro RJ12 only |
| Smart plug — any brand humidifier | Any local-API plug | On/off only via 4 outlets |
| Tower fans / unusual equipment | Works (local-API plug) | Often unsupported |
| Soil pH/EC/NPK probe | Yes — industrial 7-in-1 | Basic 3-in-1 only |
| Automation logic | ||
| VPD-driven automation | Yes — actual trigger | Display-only |
| Direct humidity-target control | Yes | No (VPD presets only) |
| Stage-presets / grow plans | Auto-advance week-by-week | No grow plans |
| CO₂ demand dosing + hardware safety backup | Yes | Not supported |
| DLI auto-dim against PAR target | Yes | Not supported |
| Software & reliability | ||
| Setup time | ~15 minutes | Reports of "over a day" |
| App reliability (forum consensus) | Stable, mature | Buggy, "released too early" |
| Web dashboard | Yes — any browser | App only |
| Wi-Fi bands | 2.4 + 5 GHz, mesh | 2.4 GHz only |
| REST API | Full, documented | None |
| Home Assistant integration | Native MQTT discovery | No |
| Where Mars Hydro wins | ||
| Sticker price | — | ~£80 — aggressively cheap |
| Out-of-box bundle (with their gear) | — | Coordinated kit pricing |
| UK retail availability | Direct only | Amazon, hydro shops |
If you’ve already bought Mars Hydro lights and fans — you’re not stuck.
Mars Hydro lights use standard dimmable drivers. Their fans are standard 12V variable-speed fans. The RJ12 connector is just a Mars-Hydro-flavoured wrapper around the same signals every other dimmer and fan controller speaks fluently. So the Nexus controls them perfectly — you bypass the RJ12 connector and drive the dimmer and fan inputs directly. Most Mars Hydro lights have an exposed dimmer jack that takes a standard cable; their fans take a standard fan input under the cover.
The change buys you: VPD-as-trigger automation, grow plans, a web dashboard, Home Assistant integration, a stable firmware, and a hub that’ll keep working when you eventually replace the Mars Hydro gear with something else.