I use rockwool or jiffy pellets. Plain tap water, (I have a well) 7.2 ph.

Some say to ph your water, but I don't agree that is necessary. Nothing wrong with going the extra mile, but not necessary for popping seeds. Once you have seedlings; I advise a ph of 5.8 for hydro and 6.5 for soil

Non nutes until plant has at least 4 alternating nodes. Then do not go over 400 ppm if watering in a tray. In Hydro I have always used ph water until I got nice roots shooting out of netpot. the I go to 1200 ppm. i use Dutch Master Advance Flower A & B, with Zone and Silica additives. Adding Max Bloom in flower

Read the growfaqs.