Using AC unit run-off water with low pH and TDS

[Zoren]

Good afternoon members. As I have posted, I bought a portable A/C for my orchids (I keep them in a closed in Florida room), because it gets to hot in the room (as high as 110 F in the summer) and the temperature doesn't go down very much at night. Even in the winter the room temperature has never gone down lower than maybe 70 F. It seems to me my plants seem happier now. I have gained another positive benefit from the A/C 'run off water'. When I run it, I get any where from 1.5 to 3 gallons of water. The PH and TDS readings seem to be as low as 'distilled water'. I've started using the water for my plants (I grow S/H now). My questions are: 1)Is anyone else using A/C water and is it working for you? 2)If the PH is low should I increase it? If yes, what should I use to increase the PH (right now the PH is at about 3.5 after I added 1/4 tsp. of MSU fertilizer to a gallon of the water). The PH is around 3.3 to 3.5 before adding fertilizer. I would appreciate any opinions and suggestions from members. Thank you all in advance..Zoren...