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Dwayne's 4ft Waterbox Reef

Dwayne's 4ft Waterbox Reef

by Dwayne
Dimensions
4ft, roughly 2.2 deep, slightly taller than wide
Tank type
Reef
This video tours Dwayne's award-winning 4ft Waterbox reef tank, crowned Australia's Best Reef Tank 2025 by Monsoon Aquatics. Dwayne shares his journey in the hobby, the detailed infrastructure and DIY solutions behind his successful SPS-dominant system, and showcases his vibrant corals and diverse fish collection. The video concludes with the bittersweet news that Dwayne will be shutting down the tank due to an upcoming house renovation, seeking new homes for his livestock.

Dwayne's 33-month-old Waterbox 130.4 is a heavily grown-in 4ft mixed reef packing SPS, LPS, softies and gorgonians, crowned Monsoon Aquatics' Australia's Best Reef Tank 2025. Its standout is the extensive DIY infrastructure — a through-wall garage wet room, self-coded Apex ATO, T-piece siphon-break auto water changes, and a Bubble Magus reactor plumbed to offset pH via the refugium. Despite the impeccable result, Dwayne is shutting it down due to an upcoming house move and renovation.

View original source
Source: YouTube · Parkers Reef
What sets this tank apart
Through-wall garage wet room
Ran the whole sump, skimmer, reactor, frag tank and water station into an adjacent garage 'wet room' through the wall, keeping all mess, noise and smell out of the living space while gravity-feeding the display.
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Self-coded Apex ATO with redundancies
Built his own top-off using Apex pseudo-code and DIY float sensors on a breakout box, adding programmed redundancies and text alarms since the ATO reservoir sits above the sump (siphon risk).
▶ Jump to this moment
T-piece siphon-break water change
Auto water change uses a simple looped T-joint as a siphon break so residual water drains back to the reservoir — no check valves or small holes to clog, so it runs essentially fail-proof.
▶ Jump to this moment
Reactor effluent into the fuge
Drips acidic calcium-reactor effluent into the bubbling refugium return so the chaeto consumes the CO2-rich water, helping offset pH while boosting macro growth.
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GSP mat as water-level tell
Lets the toxic-green GSP grow up the weir; when it chokes the overflow and salinity/level shift, it flags that it's time to trim — a living maintenance cue.
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Equipment Breakdown

Shop this build · 3 of 13 items priced
Dwayne's 4ft Waterbox Reef — Full Equipment List
$1,742
est. build cost
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Filtration
Great White
Protein skimmer
External cup with a float switch and reservoir tied to the Apex — it alarms and shuts off when full, so Dwayne can safely run it wet.
Lighting
Ecotech Marine Radion XR30 Gen 6 Blue
Ecotech Marine
Radion XR30 Gen 6 Blue
Display lights ×2
Cable-hung centrally from an EcoTech rail with DIY acrylic mounts and 3D-printed shades — factory light, home-built rigging.
$999.99 Buy → at Bulk Reef Supply Details →
Aqua Illumination Blade Grow
Aqua Illumination
Blade Grow
Accent light
Mounted along the front at 45° so it doubles as a glare shade for viewers — a fixture pulling shade duty.
DIY
Fake black Blade
Dummy fixture
🔧 DIY mod
Stained timber on the back rail purely for symmetry and weight — not a light at all.
Aqua Illumination Blade (small)
Aqua Illumination
Blade (small)
Frag tank light
Runs as a child fixture off the Radions' schedule, lighting the frag grow-out tank.
Kessil H80 Tuna Flora
Kessil
H80 Tuna Flora
Refugium light
Runs Kessil's Grow preset over the fuge, where chaeto also mops up CO2-rich calcium reactor effluent.
Flow & Circulation
Aquamaxx
Return pump
Return pump
Ecotech Marine VorTech MP40
Ecotech Marine
VorTech MP40
Wavemakers ×2
⭐ Premium pick
Pair of MP40s on Mobius modes driving the display's main flow.
In our catalog →
Ecotech Marine VorTech MP10
Ecotech Marine
VorTech MP10
Wavemakers ×2
$341.99 Buy → at Bulk Reef Supply Details →
Jebao/Jecod VorTech-style knockoff
Jebao/Jecod
VorTech-style knockoff
Wavemaker
💡 Budget hack
Budget VorTech-style clone holding its own alongside the genuine MP40s and MP10s.
Monitoring & Control
Neptune Apex
Neptune
Apex
Controller
Full Neptune ecosystem — Trident auto-testing and an auto feeder hang off the Apex, with text alarms wired into Dwayne's custom logic.
$399.95 Buy → ⚠ Out at Bulk Reef Supply Details →
DIY
Custom Apex ATO
Auto top-off
🔧 DIY mod
Self-coded in Apex pseudo-code with DIY float sensors on a breakout box — programmed redundancies because the reservoir sits above the sump, a siphon risk.
Modern equivalent: AutoAqua Smart ATO Mini →
Dosing
Bubble Magus
CR150 calcium reactor
Ca/Alk supplementation
Fed by an EcoTech Versa and held at pH 6.0, with a dosing pump topping up alk — the acidic effluent drips into the fuge so chaeto eats the CO2.

Husbandry & Notes

  • Dry-cycled the whole system in June 2022 and waited until fully mature before adding livestock
  • Quarantined and separately cycled a QT system; all fish added slowly as juveniles
  • Runs a calcium reactor at pH 6.0 fed by an Ecotech Versa; supplements alk with a dosing pump
  • Water changes roughly fortnightly now that the tank is mature and stable
  • Low fish load by choice — favors small fish and swim space over big stockings
  • Keeps alk ~7.8–8.2 dkH, calcium ~400, mag ~1440, nutrients bottomed out, pH above 8
  • Filter roller tuned so nearly all water passes through it rather than the overflow bypass
  • Occasional sand-bed vacuum mainly to export nutrients, otherwise hands-off
Reported parameters
Alk (dKH)
8.2
Calcium
400
Magnesium
1440
Nitrate
bottomed out / undetectable
Phosphate
bottomed out
pH
kept above 8 (reactor pH 6.0)
It's got 6ft vibes. Like it feels like a big tank.
Big cycles often produce big results.
The pH will be where it bees — I've almost given up on it now and haven't seen any better results.
A T-piece and gravity rarely fails.
There's no scenario I can play that is going to be beneficial for the livestock, so I have no choice but to shut it down.