I used gravel rocks for growing for only 25 years:thumbsup:
1 totaly wash you new 3/8 gravel
2 give them a blast of bleach to kill any critters
3 flush the hell out of that. :stoned:

I start out my seed/ clones with perlite vermiulite 70/30 :thumbsup:
Tranplant them in to bloom state after they are 30 in tall after they have been fimed and choped till they get 30 inches.:thumbsup:
Never had a problem and went to hydrocorn as it was easer to clean the rocks. i used a 1/2 hardware mesh over some 2x4 frame:thumbsup:
I did not notice a differance with the timming, fert uptake, and not last but least the final quailty and weight:thumbsup: