Side-profile shot of a massive six-foot rimless glass aquarium filled with clear saltwater, minimal dry rock structure, and clean blue-spectrum overhead LED lights.
Side-profile shot of a massive six-foot rimless glass aquarium filled with clear saltwater, minimal dry rock structure, and clean blue-spectrum overhead LED lights.
— Saltwater Hub

Big Reef Tanks

Honest gear advice and transparent build logs for marine aquariums 150 gallons and up. Documenting equipment selections, plumbing configurations, and real-world costs as we convert a 185-gallon freshwater tank into a reef.

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Upcoming Reef Guides

Comprehensive breakdowns focused strictly on large water volumes where small-tank assumptions fail. Each technical buyer's guide is currently in production.

Coming soon
Coming soon
Coming soon

Best Reef LED Lights for 150+ Gallon Tanks

Best Protein Skimmers for 150-250 Gallon Reefs

Best Wavemakers for Big Reef Tanks

Coverage arrays, mounting heights, and penetration metrics through 25-inch and deeper water columns.

Internal vs external skimmer bodies, air draw ratings, and sump footprint requirements for heavy bio-loads.

Managing wide laminar flow versus narrow jet currents across six-foot and eight-foot glass panels.

Coming soon
Coming soon
Coming soon

Best RO/DI Systems for Reef Tanks

EcoTech Radion vs. AI Hydra vs. Kessil

Complete Equipment List for a 180-200 Gallon Reef

High-output membranes, booster pumps, and dual deionization stages sized to produce 100+ gallons weekly.

Direct spectrum analysis, app reliability, cluster shadowing, and fixture density required for deep tanks.

Itemized plumbing, gate valves, return pumps, heating redundancies, and baseline automation hardware.

+ Active Project

The 185-Gallon Reef Conversion

The build is just starting. Converting an established six-foot freshwater system into a marine reef introduces unique structural, plumbing, and filtration challenges. Follow along as each phase unfolds step by step.

Phase 01
Phase 02
Phase 03
Phase 04

Plan and Budget

Teardown

Plumbing and Sump

Lighting

Cost forecasting, stand reinforcement assessments, and electrical circuit loads.

Draining 185 gallons, rehoming freshwater livestock, and deep acid-washing the display glass.

Hard-plumbed schedule 40 PVC, BeanAnimal overflow configuration, and custom baffled sump.

Overhead canopy fabrication, bracket mounting, and PAR spectrum balancing across the sandbed.

Phase 05
Phase 06
Phase 07

Flow

Cycling

First Livestock

Cross-tank gyre placement, dead-spot elimination, and quiet variable-speed DC pumps.

Fishless dry-rock ammonia dosing, nitrifying bacteria colonization, and nutrient stabilization.

Quarantine protocol, cleanup crew acclimation, and hardy introductory coral frags.

Macro shot of aquarium equipment layout showing neatly labeled PVC plumbing unions, ball valves, and sump partition glass.
Macro shot of aquarium equipment layout showing neatly labeled PVC plumbing unions, ball valves, and sump partition glass.
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Big Tank Equipment Checklist

Sign up to receive the free planning sheet, sizing matrix, and gear checklist tailored for aquariums 150 gallons and up.