anyone ever use florakleen !!!!!!

anyone here ever use the stuff florakleen i was told in my last post that i have a nute buildup & that i should flush. my sativas r 7 feet tall indoors & have been stuck in flower 4 a few weeks with little to no further progress or bud development . someone on here recommened using 2 tbsp. of sugar with warm water 2 flush but i was scared do so , is this product anygood and shoould i use it, (u can read about my situation and seee my pics under my profile or however you can search my post from last week. thanks

and how much is save to use they r about 7 feet tall bushy as hell and r in 5 gallon pots.

To flush your plant, you need to use twice as much water as your pot size(distilled, r/o or phed) example: 5 gallon pot, flush with 10 gallons of water. You don't really need to buy a chemical to properly flush your plants

2 tbs per gallon use 2 gallons per gallon of soil