How Much Flow Should A Reef Tank Have (Everything To Know)
Reef tanks are borderline magical, and even more so when you fill and care for one yourself. That's why everyone who has a reef tank wants to take the best care of it as they can, and that means doing a hefty amount of research to answer all the questions you may have . For instance, how much water flow a reef tank needs.
Reef Tank Water Flow Guide
Everything you need to know about water flow in a reef aquarium — from calculating GPH by coral type to choosing between powerheads, wavemakers, and gyre pumps. Compiled from Bulk Reef Supply, Reef Chasers, Reef Tank Resource, Top Shelf Aquatics, Reef2Reef, and the reef keeping community.

Flow deserves the same attention. In this guide, you will learn how reef flow works, how much you need, where to place pumps, and how to troubleshoot common circulation issues. You will also see how flow needs differ for soft corals, LPS, and SPS systems. By the end, you will know how to build a more stable and healthier reef aquarium.
Reef Tank Flow Calculator
If you have ever stared at a wall of powerheads in a fish store and wondered which one is right for your specific setup, you are not alone. Getting the water movement right is arguably the most critical factor for coral health after lighting. That is where a reef tank flow calculator becomes your best friend. In this guide, I am going to walk you through exactly how to calculate your flow ...

When it comes to determining how much flow your reef tank needs, there are a number of factors including the type of flow and how many pumps. I simplify this and help you choos the best flow for your saltwater aquarium.
How Much Flow Does My Reef Tank Need
Quick Answer Most reef tanks need 20-50x total tank volume turnover per hour. LPS and soft corals prefer lower flow (20-30x), while SPS corals thrive with higher flow (40-50x or more).

Too much direct flow can be just as harmful. In this guide, you will learn what reef tank flow does, how much you need, where to place pumps, and how to troubleshoot common problems.
Let's talk about perfecting water flow in a reef tank
Figuring out how to perfect water flow in your tank can be a challenge!! You're trying to find the best flow patterns & rates, pump placement, meet coral needs, not stir up the sand bed (but keep food suspended in the water column), eliminate dead spots, consider aquascape patterns and obstructions, and that's just getting started.
Reef Tank Flow Calculator A reef tank flow calculator determines the ideal water turnover rate (gallons per hour) for your reef tank based on volume and coral type. Enter your tank size, sump, coral mix, and tank length to get a recommended GPH range, powerhead count, and placement guidance.