i have 2 3 to 3 1/2 week old clones.. dwc 2 5 gal. buckets 400w mh.. since i started them in the buckets ive been getting reddish brownish "gunk" collected on my roots...my leaves are barely turning downwards at the tips... the gunk is the same color as the hydroton and idk if it could be coming from that or what.. can anyone help me out?