CO2 CO2 Indicator
This product is useless since the suction cup does not hold the unit in place for more than a minute. It than falls to the bottom of the aquarium.
June 19, 2013
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