
Control Box
C9000 · ALU 2420/3620/4820
Small Medium Large Dimensions 350 x 112 x 350mm 271 x 103x 784mm 529 x 103 x 400mm 13.8" × 4.4" × 13.8" 10.7" × 4.1" × 30.9" 20.8"...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.

| Small | Medium | Large | |
|---|---|---|---|
| Dimensions | 350 x 112 x 350mm | 271 x 103x 784mm | 529 x 103 x 400mm |
| 13.8" × 4.4" × 13.8" | 10.7" × 4.1" × 30.9" | 20.8" × 4.1" × 15.7" | |
| Dimensions (Internal) |
329 x 90 x 328mm | 233 x 91 x 746mm | 491 x 81x 377mm |
| 12.9" × 3.5" × 12.9" | 9.2" × 3.6" × 29.4" | 19.3" × 3.2" × 14.8" | |
| Framework | Anti-corrosion Aluminum Alloy | ||
| Panels | 10mm PVC Board | ||
| Cabinet Model | ALU 2420/3620/4820 |
Not compatible with: Contact us for more details. |
MSII 4825/6025/7225 |
Build around the Control Box.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from controllers & automation. Most buyers reading this page should buy the middle column.
Asked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.

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