o2 level

cammy · 05/22/2007, 05:08 PM

How can I measure the oxygen level of my tank water?

ken6217 · 05/22/2007, 05:25 PM

Why do you want to measure that? Do you have a problem? That really is a paramater that you don't need to test for.
Ken

cammy · 05/22/2007, 06:02 PM

No problems just don't want to have any due to low o2 levels

Henry Bowman · 05/22/2007, 06:08 PM

Low o2 or elevated Co2 can be an issue. There are Dissolved O2 test kits. The best way to tell if you have low o2 / high Co2 is to watch the pH. If your pH is low or if you would like it to be a bit higher, you can take a cup of tank water OUTSIDE and put an airstone in it and let it aereate for an hour then test the pH. If the pH is significantly higher in the tested water than your tank, you have elevated Co2 in the tank. Best remedy is to extend your skimmer's air line out a window to pull in less Co2 laden air.

bertoni · 05/22/2007, 06:39 PM

Salifert sells an oxygen test kit that seemed okay to me. Oxygen doesn't affect pH, though.

drummereef · 05/22/2007, 09:03 PM

I agree with Henry. The first thing you will see with low oxygen levels is a depressed pH. If you pH is hovering around 7.8 and not getting any higher then you may have a problem. The air stone test he recommended is a good way to tell if there is an issue.

mbbuna · 05/22/2007, 10:02 PM

Quote:

Originally posted by bertoni
Oxygen doesn't affect pH

this needs repeating

05/22/2007, 05:08 PM	#1
cammy Registered Member Join Date: Sep 2003 Posts: 48	o2 level How can I measure the oxygen level of my tank water?

05/22/2007, 06:08 PM	#4
Henry Bowman Reefing since '87 Join Date: Jul 2006 Location: Allegheny Mountains of VA Posts: 2,162	Low o2 or elevated Co2 can be an issue. There are Dissolved O2 test kits. The best way to tell if you have low o2 / high Co2 is to watch the pH. If your pH is low or if you would like it to be a bit higher, you can take a cup of tank water OUTSIDE and put an airstone in it and let it aereate for an hour then test the pH. If the pH is significantly higher in the tested water than your tank, you have elevated Co2 in the tank. Best remedy is to extend your skimmer's air line out a window to pull in less Co2 laden air. __________________ Have a good'un Current Tank Info: 90 gl SPS dominant / upgrade in the works

05/22/2007, 06:39 PM	#5
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Salifert sells an oxygen test kit that seemed okay to me. Oxygen doesn't affect pH, though. __________________ Jonathan Bertoni

05/22/2007, 09:03 PM	#6
drummereef Team RC Member Join Date: Jul 2006 Location: STL Posts: 14,754	I agree with Henry. The first thing you will see with low oxygen levels is a depressed pH. If you pH is hovering around 7.8 and not getting any higher then you may have a problem. The air stone test he recommended is a good way to tell if there is an issue. __________________ -Brett 180g Marineland Starfire In-Wall 278 gallon system

05/22/2007, 05:25 PM	#2
ken6217 Registered Member Join Date: Oct 2006 Location: NJ Posts: 2,179	Why do you want to measure that? Do you have a problem? That really is a paramater that you don't need to test for. Ken

05/22/2007, 06:02 PM	#3
cammy Registered Member Join Date: Sep 2003 Posts: 48	No problems just don't want to have any due to low o2 levels