I use RO water the whole 14 days if they even take that long to root since I average 5-10. I have horrible tap but the cheap RO filter does the trick. I used to use Arrowhead for my aero cloner and it worked just fine.
yea bro, check out the perlite wick cloner. was having a lot of issues with clones yellowing up, or me just forgetting to keep the plug wet. the perlite cloner is awesome, just throw the clones in there, change the water every few days, and in 10-14 days you got a lotta roots
for 2 years I have used the same procedure in 2 different locations, cutting, trimming leaves, dipping in clonex, domes, heat 95+% success rate
ONLY variable here is new op, new environment, and different tap water
I doubt I am getting air bubbles now.
I changed some other things recently. Turned off bathroom exhaust fan to get room temp from 71 to 77,, and to raise RH. keeping domes off unless clones wilt. I got some to root out of the last batch, rest still look very good. The fan may be the solution
Clones in rockwool never got a dome and they are starting to rot, 2 out of 20ish and they all look real healthy. maybe 50% in the trays with the plugs. The plugs got covered at night sometimes, but were left open as long as possible until they started looking wilted