Filtration & Equipment
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How Much Does a Saltwater Aquarium Actually Cost?
Real 2026 prices for a saltwater tank, from a 20-gallon nano to a 158-gallon reef. Tank, equipment, rock, bacteria, pods, running costs and a realistic setup timeline.
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Torch Coral Not Extending? 8 Causes to Check, in Order
Closed polyps tell you almost nothing. Work through flow, light and UV, nutrients, neighbors, flatworms and brown jelly in the order that actually finds the cause.
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Sand and Substrate in a Reef Tank: Depth, Grain Size and Whether You Need It
What a reef sandbed actually does, the honest case for bare bottom, why grain size decides everything, safe depths, layering fine under coarse, and how sand affects cycling.
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Live Rock vs. Dry Rock: Pros, Cons, and the Hybrid Method
Every reef tank needs rock — it’s the structure your coral sits on, the surface your bacteria colonize, and most of your tank’s biological filtration in one package. The question is where that rock comes from: pulled straight from the ocean as live rock, or purchased bone-dry and built up from scratch. Both routes work,…
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Reactors Explained: GFO, Carbon, Biopellet and Calcium Reactors
What a reactor is, whether you need one, and how to run GFO, carbon, biopellet and calcium reactors properly – with media quantities, flow rates, timelines and the mistakes that cost corals.
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Auto Top-Off (ATO) Systems: Why Your Reef Tank Needs One
Evaporation happens in every reef tank, every single day. An auto top-off system, or ATO, is the small piece of equipment that quietly replaces that evaporated freshwater before it ever becomes a problem. It’s one of the least exciting purchases you’ll make for a reef tank, and also one of the most important. Below we…
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How to Operate a Protein Skimmer (and Why It’s Necessary)
A protein skimmer is one of the few pieces of equipment we consider genuinely essential on a reef tank, not optional. It does a job no other filter really replicates: pulling organic waste out of the water before it ever has a chance to break down into ammonia and nitrate. Here’s how it works, why…
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The Importance of UV Sterilization in a Reef Tank
A UV sterilizer is one of the most misunderstood pieces of equipment in the hobby — some hobbyists treat it as a cure-all, others skip it entirely. It’s neither. Used correctly, it’s a genuinely useful tool for water clarity and pathogen control. Here’s what it actually does, what it can’t do, and how to size…