I have to agree with ZZ on this one. I ran a similar setup to yours starting with the small rockwool cubes for clone and then put it in a 2" or 3" netpot with more rockwool shredded and put in the netpot to fill out the remaining space. I assume you are doing the same but using the hydrotron for fill.

I used a single line drip of just one 1/8" open end tube at the top of the small rockwool cube.(30gph pump) Believe it or not I had the best results watering just 1 minute twice a day.(lights on) The rockwool holds the water and also draws in air as the water passes through. As the roots grow down from the netpot the water drips from the netpot down the roots keeping them moist but not drenched or soaking wet. The hydrotron acts differently from rockwool/pearlite in that it does not hold the water as well and sometimes demands more watering as a result. If you have any rockwool/pearlite involved you will want to use less watering time and only a few times a day (3 or 4 max). Reduce the watering time and frequency to a maximum of 3 to 5 minutes 2 to 3 times a day or maybe even less. The plant will tell you if you need more in plenty of time to change the schedule. Keep in mind that the plant wants less watering in veg than it does in flowering in part because it is usually a bigger plant when in the flowering phase. Some say to only water when the lights are on to help keep the humidity down. The lights help burn off some of the moisture.

BTW keep your airstone setup as is.