It is as easy as adding water. I have a couple journals dedicated to Grow Dots. The Photo grow is here: Jack’s vs. Grow Dots: Rebooted
Essentially the way it works is they have a specific NPK breakdown for veg, and it naturally transitions to a bloom formula as the nutrients dissolve.
I found a mild nitrogen toxicity around week 5-6 when growing autos - I don’t recall if I encountered that with the photos but I kind of think I did.
In a clone side-by-side grow off, Dots actually yielded slightly more than Jack’s 321. The reason I don’t use them religiously is cost. I couldn’t justify the price difference for “a little more” in terms of yield. But if you want a grow where all you do is water your plants and let ‘em do their merry thing, it’s the way to grow.
Dots last probably about 16 weeks in actual practice, maybe a bit longer. I was able to finish the photoperiod plant without needing to topdress it, but I bet if you wanted a long veg period (10+ weeks), you may need to add a fresh dose around that 10 week mark to ensure she has enough to get to the finish line.
I needed to supplement with CalMag later in my grow. I understand that Real Growers adjusted the formula after my grow and added more CalMag to the recipe, so it may not be necessary anymore.
I believe @Twelve1 and one of the mods (@BobbyDigital , was it you?) uses/used the Dots as well.