Aloha, brah

Your slime is caused by the vinegar.
I had the same problem when I started with DWC.
Buy some decent PH down, (Phosphoric acid is good).

And so is chloramine!:thumbsup:

I'd be willing to bet that your water supplier uses chloramine instead of Chlorine gas to dis-infect and protect your water.
If so, "letting water sit, won't do shit", and, that's a good thing for plants.

I'd suggest that you lose the carbon filter and let the chloramine do it's job.
(kills anaerobic bacteria, molds, mildew, single-celled nasties, and algae.)
I now run my buckets near 90 degrees F. and never change-out the nutes for the entire run.
3rd grow, NO water problems.

Just :twocents:
T. I. O. L. I.

Aloha,
Weezard