Review on Fluval A7551 CO2 Indicator Kit by Linh Hellmuth

I bought this for my first CO2 system and it seems to be working fine. Someone else wrote that after filling it goes slowly and they were in place. This is key to keeping fluid where it's needed. I've also found that turning and tapping lightly at the same time also helps. Once in the aquarium it took about 24 hours to start reading and it really works. I got a bright green with CO2 at about 1 bubble per second and got a little darker after bumping it to just under 1/sec. have reduced. However, I had a small leak but I think it was caused by me moving this location. Until then and since then the liquid level has not changed. Still seems to be working after four weeks of use. One bottle lasts for about three cycles of four to six weeks each; I aim for six since I dose easily. I will update if there are big changes after the change. I would go with a glass bottle but it's too big for my 5 gallon tank. I would also like it in black.