Ph strips
Only $0.99 on ebay. Search for "ph strips" you'll find many. If you don't want to wait a month look for your own online shops.
I have these strips and also have some narrow range soil PH solutions from a hardware store for $3.50 Able to get soil PH directly and the water as well.

Water
Is that the water from air? If so, it has nothing inside, plants will not be able absorb nutrients with that water. And, it is not good to use them without boiling if I'm not mistaken That is similar to distilled water and you need to use callmag with it. (I don't know the details about this, I may be mistaken)

Fan
Best use is: leave the door open, make an exhaust exit on the opposite side to the door, point/attach the fan to the exhaust. At night close the door but not completely, leave just a little open (enough for air but not enough for strong light leak.), don't close the exhaust.
However you do, change all the air in every 3 minutes, day and night.