Reef Central Online Community - View Single Post - 57 watt aqua u/v, which mag drive to use, mag 12 or mag 9.5

DarG · 03/08/2008, 09:24 PM

I run mine 24/7 but some run them only part of the time.

There are flow meters that go inline with the plumbing.

Outside of that, take a container with a know volume and a stop watch or watch with a second hand. Time how long it takes to fill the container and do the simple math. For example, if you use a 1 gallon container and it takes 20 seconds to fill it ... 3 gallons per minute X 60 minutes = 180 GPH. You can get close enough for just about anything with that method.

03/08/2008, 09:24 PM	#13
DarG Registered Member Join Date: Dec 2006 Posts: 5,515	I run mine 24/7 but some run them only part of the time. There are flow meters that go inline with the plumbing. Outside of that, take a container with a know volume and a stop watch or watch with a second hand. Time how long it takes to fill the container and do the simple math. For example, if you use a 1 gallon container and it takes 20 seconds to fill it ... 3 gallons per minute X 60 minutes = 180 GPH. You can get close enough for just about anything with that method.