Honestly,
www.htgsupply.com has the best deal on straight up FF purchases, or most purchases to be honest. They ship shit out quick too, and the S&H wont kill u either. Another option is toget your shit off of ebay, sometimes you can save a couple bucks here n there on your soil and nutes on ebay, so id recommend looking there too.
If your thinking about goin online to get your soil n nutes - just remember this man - its worth it. If your only other option is using generic potting soil, or mg soil, then go with the FF. its not THAT expensive - its like 20 bucks for a BIG ASS bag of Ocean forest, and about 12 bucks per bottle of nutes - grow big- big bloom- tiger bloom. Well worth it man, you can tell the difference within a day of transplanting out of your shitty soil and into the quality. Its all organic based, and even if you choose not to flush before you harvest, you wont have that nasty chemical aftertaste. it might be aTEENY bit harsh, but nothing too bad. I would still flush of course, but FF is the way to go if your gonna make a change bro.
Take it from me - someone who used MG 3/4 of the way through his 1st grow. I burned my plants so many times its rediculous, lol. I also transplanted into like 3 other different soil mixes before i gave up n went with the FF, and ill never go back to anything else. my next step is no soil at all, but until then, only use the best brother. youll be thanking yourself later, n so will your plants!!
-K1.