For $7 you can get a bottle oh liquid pH indicator drops, which is all a soil dude really needs for the rare times you have to mess around with your pH.

If it's super hot, spend the $$ on a good exhaust fan to add even more ventilation. Your plants will be okay up to about 85'F if they have lots and lots of fresh air.

You can get a GREAT effect with less work with a simple Sea of Green setup, but the trade-off is higher plant count. It's very popular though, and really easy to do especially if you have a mother plant who gives you clones every 2 months.
stinkyattic Reviewed by stinkyattic on . One month to go, yellow leaves with brown spots i have a few plants, some of which are developing some yellow leaves and brown dead spots on them. they are growing in FFOF, using FF nutes, i worked my way up to full strength and they burned a little bit. i watered with only water 3 times after that, tap water ph is around 7.2 or a little higher, all i have now is a drop ph indicator. the runoff was at a ph of 6 ( or lower test only goes to 6 ). i gave them 1/2 strength nutes after these pics were taken. any input is appriciated! Rating: 5