Scummy Cheese in Resevoir.!! HELP

duzer

Member
I had a problem with the reservoir scumming up with cheesy scum.
I use advanced Nutes and I started using Humboldt Co Bushmaster vertical growth inhibitor as a folair spray:joint::spew:.

I wash my reservoir out every week. Do I need to scrub my grow tray?

Could molasses or brown sugar cause this?
Any help is better than none.
 
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