Is the sludgy looking spot on the roots actually sludgy? Is it slimy to the touch?
Is that part of the root generally not under water?
If it is slimy like mucous then I would expect it’s pythium, and we will need to go through possible ways to remediate.
If it isn’t slimy, it could be something in your nutrients that is staining the roots at/around the water line. I use GH nutes but not the Maxi series. I think maybe @Grandaddy013 is using the Maxi series?
Yes I was using floralicious plus the chart showed for recirculating I just assumed it was ok for just dwc as well. I’ll check for the slime and sludge when I get back home. Yes I believe the brown part is not under water
I found out when I started to work at a whiskey distillery that bleach is a bad thing. The industry actually uses paracetic acid which isn’t really readily available to us but hydrogen peroxide is. The nice thing about it is it “goes away” rapidly and the peroxide can be sprayed directly on the plant and the roots. A straight 3% sprayed on the roots will nuke anything bad on it but it will remove all beneficial bacteria too. So a reintroduction of hydroguard and/or mykos is necessary.
Bleach is fine on plastic, but will etch commercial stainless vessels making them rust. That’s why they use peracetic acid which is very powerful oxidizer also. Alternatively they also use >0.1M NaOH solution (pH 11) to sanitize and then use steam to sterilize in closed systems.
That’s for larger distilleries lol. We used an H.D. “Brute” for Brew’r’eez and Paracetic: dunked all our stuff in those and used the solutions to pump through the pump hoses. Only a 550 gallon still and 1,000 gallon cooker.
And the main reason to not use bleach was how difficult it is to dissipate. Paracetic is fast; immerse and let dry.