CO2 CO2 Indicator
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Useless
When I finally got the suction cup to stick it kept filling up with aquarium water.
April 6, 2013
The seal leaks so it`s useless
The seal on this unit does not work.I have even sealed it with silicone but there is no way to fill it then.I hope my fish don't get CO2 overdose.
September 9, 2012
It is junk.
You can't tell top from bottom. Vague instructions. I have gone thru half of the bottle of chemical and still can't get it to work. I only get blue when it isn't leaking or upside down...or is it right side up?
May 1, 2012
Meh
I didnt really get great results. the suction cup to hold.....well it never held. good design though just poor quality. The solution always said i needed more. I made a DIY and also checked with another friend's DIY and both of our came out the same but this said still add more. with an injected tank this could be deadly. I tried since it wasn't to expensive so not a big loss...but take my loss and dont make the same mistake....try another or go DIY
April 20, 2012
 "CO2 Indicator and Refill")
Constantly monitor carbon dioxide levels in live-planted aquariums with ease. Azoo CO2 Indicator employs a simple colorimetric system that provides insight into aquarium CO2 levels. Just compare the color of the prepared solution to the included color chart to see if aquarium carbon dioxide levels are Excessive, Optimal, or Deficient. Prepared CO2 indicator solution lasts for three weeks for long-lasting results. Use the Azoo CO2 Indicator as an important tool in establishing and maintaining a healthy planted aquarium environment.
