In my first attempt at DWC I have discovered what looks like root slime last night. I need some help to identify the potential cause and treatment plan. Pictures below.
Conditions before slime:
Green Planet nutrients
EC around 0.9
Conditions when noticed slime:
pH 6.2 (drifted UP, not down as indicative of bacterial growth)
EC around 1.3-1.4
Roots are brown-ish but I read that MC will do that. Last night i got home late from a business trip and immediately treated the rez (66L) with about 0.5g of HTH 47% pool shock. Pictures below from after the treatment.
Slime does not smell bad. Root tips/outsides do not pull off easily, Plants look healthy. Not sure if new root growth is present, I did not pay attention. The slime is concentrated in the knots that the roots form when the bubbles get them all tangled.
The 4x DWC buckets are fed with a 20W Danner pump, one XL airstone each (5 true watts per bucket, plus another 5W pump in the rez)
Recirc rate is pretty slow at about 230L(60G)/hr
This is what the roots look like. The slime is in the knot in focus.
This is what the plant looks like:
Any thoughts/ideas very much appreciated.
The only big change was going from green planet nutrients to megacrop. I do not want to blame the nutrient if I did something wrong though.
EDIT: This is what the roots looked like before: