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The 20-Year-Old 180-Gallon Reef

The 20-Year-Old 180-Gallon Reef

Volume
180 gal
Dimensions
60" x 24" x 22-23"
Tank type
SPS Dominant
This video tours Joe T's impressive 17-year-old reef tank, showcasing a mature and thriving SPS-dominant system. Joe shares his philosophy on stability, natural methods, and the challenges and rewards of maintaining a long-term reef, including his unique approach to sand bed maintenance and nutrient control.

A ~17-year-old custom 180-gallon closed-loop reef that evolved from LPS to a dense SPS-dominant mixed reef with many OG corals and a selective 20-30 fish load. Joe runs it old-school and simple with a 17-year untouched sandbed, calcium and kalkwasser reactors, carbon dosing, and daily trace/iron/manganese, chasing stability and a 100:1 nitrate-to-phosphate balance.

View original source
Source: YouTube · Top Shelf Aquatics
What sets this tank apart
Abandoned GFO and carbon media
Stopped GFO/carbon after linking them to trace-element stripping and RTN; instead runs an aluminum reactor and daily iron/manganese dosing to hold nutrients.
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100:1 nitrate-to-phosphate targeting
Deliberately balances 5 ppm nitrate to 0.05 phosphate, finding this exact ratio gives best SPS color and growth in his tank.
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Biennial full tank reboot
Every two years he tears down, sets up a full parallel holding system in his office, and rebuilds to fight coral congestion while keeping animals unstressed.
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Filefish for Montipora nudibranchs
Keeps a filefish specifically to control his one persistent pest, Montipora-eating nudibranchs, biologically rather than chemically.
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Equipment Breakdown

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Filtration
Bubble King Protein skimmer
Bubble King
Protein skimmer
Protein skimmer
⭐ Premium pick
Royal Exclusiv's German flagship carries export on a system running no GFO or carbon — Joe leans on skimming and carbon dosing instead.
In our catalog →
Lighting
Metal halides
Display lights
Old-school point-source intensity over a dense 17-year SPS forest — the halide shimmer and PAR punch modern LEDs still get measured against.
Modern equivalent: Kessil AP9X Reef LED →
T5 fluorescent bulbs
Supplemental T5s
Fluorescent fill around the halides — the classic MH-plus-T5 spectrum combo of the pre-LED era, still prized for even coverage.
Modern equivalent: ATI Sunpower 8-Bulb T5 Fixture →
Reef Brite LED strips
Reef Brite
LED strips
Accent lighting
Slim actinic strips bolted on for blue pop — an easy LED addition that boosts fluorescence without abandoning the legacy halide setup.
Flow & Circulation
EcoTech MP40
EcoTech
MP40
Wavemakers ×2
Paired MP40s add randomized surge on top of the closed loop's steady base circulation through the SPS canopy.
Tunze Powerheads
Tunze
Powerheads
Wavemakers ×3
🏋️ Workhorse
Three Tunze streams round out flow through the coral canopy — simple, endlessly rebuildable pumps that match Joe's keep-it-simple ethos.
Monitoring & Control
Neptune Controller
Neptune
Controller
Controller
Monitors a tank whose entire philosophy is stability — Joe's one near-crash traced back to controller, dosing and chiller failures, not his method.
Dosing
Calcium reactor
Ca/Alk supplementation
Handles the heavy Ca/alk draw of the SPS forest, with a kalkwasser reactor alongside to prop up pH in the basement setup.
Modern equivalent: GEO's Reef CR618 Calcium Reactor →

Husbandry & Notes

  • Full tank reboot every 2 years: corals moved to office holding system while rockscape and sand stay
  • Never vacuums or changes the 17-year sandbed; only siphons broken coral branches
  • Stocks ~1 Nassarius snail per gallon (~180-200) to keep sandbed turned over
  • Keeps fish load selective at ~20-30 fish to control nutrients
  • Carbon dosing plus daily trace elements to hold nutrients without GFO or carbon media
  • Doses iron and manganese daily to maintain stable nutrients
  • Runs kalkwasser reactor to keep pH up in a basement setup
  • Targets 100:1 nitrate-to-phosphate ratio (5 ppm NO3, 0.05 PO4)
Reported parameters
Alk (dKH)
8.5
Calcium
440
Magnesium
1400
Nitrate
5-10 ppm
Phosphate
0.05 ppm
Stability is the key — whatever parameter you choose to stick with, your corals will adjust to it.
The higher the numbers are, the dirtier the water is, but your corals are not going to consume more than they're already consuming every day.
I always looked at reefing in a natural way — we don't go vacuum sandbeds in the ocean.
The OGs will always be the OGs, the OGs will be king.
Find a method, find a way that you're comfortable with, but stick with it.