there are digital ph meters available on ebay for $10-$15.
You can get a digital thermo hygrometer at walmart for $6.50
I am using the AG nutriet tabs sparingly, usually adding about 1 tablet for each gallon of water. I fully disolve the nutes first, then refill the res with it. I also noticed a substantial increase in growth with adding nutes, and not just vertical and foliar. I noticed increase flowering properties.
I have two females, and one that has just began growing pre flowers, it was stressed a bit so it may take some time and hopefully it is not a male.
I decided to buy a wardrobe enclosure from walmart for 20 bucks. I will be lining it black plastic and then will re-line the black plastic with white plastic, this should keep light in and keep light from the outside from messing with photoperiod. I also am compiling an 8-26w cfl light fixture to replace the full spectrum AG lights, I will use 6 red spectrum and then 2 daylight spectrums bulbs.
anyways here is my progess as of today.
I know the little CFL side light isn't doing much but i wanted to add more red spectrum to it. I had a little burning because i few of the leaves had were touching the light this morning.. that is why i had to get it out of the wood enclosure so i could let them get bigger