I never added Miracle Grow, but have tried Texas Tomato Food, FloraNova Grow, MasterBlend formula, and this year I tried this:
http://https://greenleafnutrients.co...v=7516fd43adaa
You can get a free 300 G sample for just shipping (about $3) and it will be enough for you to judge. In the sample, they send a free scoop with a longer handle so it makes it so easy to dump in the tube.
Requirements: I didn't want anything that I had to pre-mix. I just wanted to dump x amount down the tube.
I liked it so much I bought the huge bag.
I haven't done the TTF for a couple of years, but I remember it being really good.
FloraNova Grow - I just didn't know how much to use.
MasterBlend Formula - it needed to be premixed and was just a drag pouring it down the tube.
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The sample pack will make 75 gallons @ 4 grams per gallon. The scoop has 2 lines - 20 grams (for 5 gallons of water). I didn't PH it, I didn't need to add calcium Nitrate, it was really easy.