On seedlings, I just hand water them with pH'd water. It will take a few days when they are in your system to reach the water. The nute mix that I make up for them when they get to the water is full strength week 1 nutes that FF has on their "hydro" feeding chart tables. I think its like 3tsp per gal BB and 2tsp GB per gal. And again, it comes out to about 400ppm, and im NOT using distilled water. Some say 5.8 pH is the true number, but generally a 5.8-6.3 is the golden range imo. When you give the tron a bath, it will most likely raise the pH of the water the first time, so a 2nd bath may be needed. But when you get it to hold at about 6.0 pH, then its good to use.