Aerocloner refusing to root - help? :)

Looking to dial in the use of old school Turboklone aeroponic cloners

Currently having a few problems ranging to, yellow leaves, Pythium and having no roots but plenty of calluses
See attached for photos of roots and yellowing leaves

Beginning stages:
Cuttings dipped in purple clonex then put immediately into aero cloner
PH 5.7, 0.2ec - 2ml pythoff, 10ml DynaGrow Root Stim, 5ml Dynagrow Protekt, 10ml ph down <- water content
it is very hard to maintain PH due to there being no nutes / stabilizers in the res water

After calluses are present:
Upped the PPM / EC to 650/700 or 0.7-0.8ec and PH to 5.8-6
PH 5.7, 0.7ec - 2ml pythoff, 10ml DynaGrow Root Stim, 5ml Dynagrow Protekt, 10ml ph down, 10ml DynaGrow foliar food (general nutrient)
Set up a cycle timer, currently set to 10min on, 25min off hoping to make the clones reach for water/grow roots
Admittingly I've only recently upped the EC and dropped root stim after the calluses are established after reading a few studies


Looking to get some suggestions,
I've upped temp from 18c-20c to 20c-23c (68f-73f)
I've lowered the PPFD/umol under the plants to combat yellowing leaves
I've dropped the used of DynaGrow Root Stim as apparently this can inhibit root growth in older clones?

KISS man, you’re complicating things and you’ve likely roasted them.

you could literally just use PH’d water at 5.5-6.0 and have no issues.

All I do is cut, dip in Clonex and then my water is 5ml Clonex per gal ph’d to 5.5ish and I typically have to add 1 more gallon before they’re finished

Ditch the snake oil, water neat from the tap, water temp around 20, room temp 24c with 55/70% humidity.

If you can't keep the water temp low enough use bleach or pool shock in the water.

First clone is pretty sick. Adding stuff like you do wont heal the disease which already doomed the plant you have taken the clone off. You should consider to root them the old school way separately and not putting them all into one system.

“Upped the PPM / EC to 650/700 or 0.7-0.8ec”

which scale is this lol?