Problems with bubble cloner!

Hello GC!

I'm having some issues with my bubble cloner. It's a replica of what mechanibus is using in his setup. I just can't get em to pop roots with this setup. My old Rump inspired mister cloner only got one to root. They are all in the bubble cloner now.
I think I had the ppm too high...Swapped both res' with fresh water and more botanicare power clone. The ph is now around 6.1-6.2

I've also gone through a range of heat temps. Started out very cold, got one to root then they slowed Down alot so I warmed it up to ~84 then slowly brought it back down to about 78. Still nothin so when I swapped out eith fresh water I made sure it was a little cold.

It's going on the end of two weeks for some of them; getting kinda worried and I need em to take off asap!

Thanks for reading my bullshit