No drop checker and no idea what my KH is. My PH is at about 7.8 out of the faucet.
I'm looking to pick up a GH test kit this week (just read about how to estimate CO2 levels). To be honest, I didn't think it would be necessary to measure the KH at all with just a DIY set up. I assumed it would only produce enough CO2 to add a little boost to the set up - not really anything that would make a dramatic change.
But this morning after the lights had been on for about an hour it happened again. This time I only saw it on the Sword. The bubbles are tiny, and pop off the leaves about 1 per second. I thought it may be trapped air somehow but they're coming off the tip of the leaf and I've moved the leaf around to dislodge and particles or air pockets.