Hi all, I have a 75 gallon fresh water tank with 4 silver dollars, 2 gouramis, 2 pictus catfish, 6 nerite snails, and 3 apple snails. All the fish are about 2 inches. My tap water ph is 7.2 and my aquarium use to be about 7.6. I just tested it today and the aquarium ph is now 8.2. What could have happened? Is this a problem for my fish? The only thing I changed was adding a few (about 10 small stalks) of plants - I don't know what they are, they look similar to grass and two moss balls. I read that plants might raise the PH by absorbing CO2. I thought the plants would be a good thing for the nitrogen cycle - I'm confused. Any advice is greatly appreciated - Thanks!