Got a Buddha Tahoe OG in the mix, perlite & cocoa crumbs, Kind of neglected its watering schedule, anyway, went to water it tonight and a red liquid comes out of the drain hole which smells absolutely disgusting, like rotten eggs. I was alarmed so I flushed it with two gallons fresh water, toward the end of the second gallon the water and smell started to clear up, any idea what it was though?
I would guess some type of mold, mildew, or fungus. How's the humidity in your grow space? Anyways, I would keep flushing until the smell is gone. And if it stays, then transplant into a pot with fresh soil. Hope this helps