i use pond water mostly.
i also u 15-30-15 MG.
ive never had a problem with MG.
i use it almost every week at full strength. 1 gallon per plant. plus i have organic ferts under my mulch around the stalk. 6-3-3 and some other organic ferts... ive had no problems with burn with this combo of fertz.

the purple in the stems means they are hungry.

6 small scoops equals full strength with MG for 1 gallon. plus u have run off if u have drainage holes in your pots.
Stoner38024 Reviewed by Stoner38024 on . nute questions help hey guys im currently using mg bloom booster 15-30-15... it comes with a scoop double sided i use the samellest side, full to one gallon of water per plant .."bf blue cheese" in 5 gallon buckets.only on the same day that it is going to rain...is this ok....i havent noticed any problems...besides one plant being purple"the stalk and branches" sativa dom< and one leaf had a slight bit of a yellow spot on the tip...other 2 are growing very good way better than i thought...all 3 are female. Rating: 5