Sorry, I lost this thread somehow. Weird nobody else offered help. You still having issues?

Couple of things...

Try to keep the fluorescents as close as possible without burning. Effective range for tube fluoro's is 2-4". 4-6" max with the CFL's. You must find a way to provide fresh air and to vent the heat away from the plants. Cannabis doesn't like hot, stale air.

Nutrients are a wise investment. You'll want to eventually get something with more versitility, like the Fox Farms trio, (Google) or something similar from one of the other major manufacturers. 10-15-10 isn't the best you can use. Especially during the growth stage. IMHO, even Miracle Grow All Purpose would be better for veg.

Instructions might be for a two week feeding schedule. If any questions, you could e-mail Scotts.

I personally feed half-doses twice a week with plain ph'd water in between (if necessary) to release salts and such.

If limited in headroom, you'll want to find a method of stunting or training to keep 'em short. You can check growlogs (use the search function) for info on your strains. If anyone's grown 'em, there should be some good info.

If you can get ahold of a freshwater aquarium ph test kit, ($6.00 US) it might be an improvement to the test strips, but you still couldn't accurately check runoff.

Letting water sit doesn't change ph.

Have you got pots for transplanting?