Thats the exact stuff i am using so what do you mean by 1/4 strength? I have a 5ft, a 4ft, and 3ft all in big-ass pots w/ soil that i easily feed one gallon of water w/ nutrients weekly...So my other question is what would you recommend? I usually use maybe a 1/4 or 1/2 TBL per gallon per plant because I dont want to overdue it, do you think it would be safe to use a full table spoon?