JBL ProAquaTest CO2 Direct & Refill

The drop-by-drop count to get my CO2 right took maybe ten minutes, and the color chart is dead simple to read even in dim aquarium light. For a freshwater tank like mine, it’s the easiest way I’ve found to stop guessing and actually see the level.

Finally, a test that actually gives me a clear reading of CO2 levels without guessing at color charts. The direct method is a lifesaver for keeping my plants thriving, and it’s so fast to use.

Setup was straightforward and the color chart is easy to read, which I appreciate. It takes a bit of guesswork out of getting the CO2 level right in my planted tank. The refill option makes this a practical long-term solution for me.