my 1st indoor tent grow

i the seeds took 5 days to pop. i popped 2 strands. 1 lsd25, and also a purple thai. both autos from fastbuds.. the lsd came out strong.. this is my 1st grow with a tent.. so hoping for the best.. i have compress packs of soil im using. and i also gave both pots about 1/4 of a gallon of water with 3/4 of a cap of kangaroot added in.. i hace a small 600 light right now on them but hace a viparspectra P1500 coming.. any pros and cons from anyone on that light wuld be great.. i also have a cloudline inline/exhaust fan with carbon filters... using just bottle water (because i have well water where im at) and just dont have my NPK to help the well water get to the Ph it needs to be at, so i figured bottled would be better than well water for time being... sooo any tips anyone has or pros or cons on what im doing feel free to leave me ur input..