CO2 CO2 Indicator
Didn't work out the box. leaked into aquarium. Replaced O-Ring with new one and worked once. Would not use if it was free. Junk
March 25, 2014
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