i set up my new 20 gallon tank yesterday, let it run for 24 hours, then today i added a few plants (amazon sword, water wisteria, crypt. spiralis, anubias nana) and moss balls. About an hour after i added the plants, i tested the water with the API master kit, (I will be starting a fishless cycle tomorrow, and wanted to make sure everything was ok) and got 0 ammonia, 0 nitrate, and 0 nitrite, good results for an uncycled, unseeded tank. But my PH test came back really weird: it was a dark blue not on the colour chart, so i did a high range ph test: it was a light brown that could be an 8.2. I then checked the ph of my tap water, and it was a light 7.6. I did not preform a high range ph test following those results, as the colour was so light. I have added stress coat, stress zyme, and seachem flourish excel to my tank so far. My question is: what caused the change in ph? Should i add ph down? how soon would i have to do this? (i have been to petsmart (for equipment, i got the plants delivered) everyday for about a week and i think my parents are sick of driving me down) Is something messing with the results? I do have a cheap topfin air stone in my tank, would that cause the ph to be weird? I have attached photos of the test results - do you think i interpreted them correctly?