started off with 1/3 strength for first 2 weeks -
1/2 strength at week 3 and 4 - only vegging so far...
I might bump it up a lil more, but they seem to love 1/2 strength...
I am using DWC (10 gallons) and an aerogarden (1 gallon).
I dont have a PPM meter, but change the reservoirs every 10 days in the 10 gallon, and every 7 days in the 1 gallon.... After a nute change, the PH is perfect... i do not add any nutes until i change the reservoir. The PH starts just under 6 and creeps up to 6.5 at the end of the nute cycle.