My tank is still cycling, but I had tested my tap water a while back and the pH was around 8.0. I thought this was a lucky thing since I will be keeping cichlids which like high ph. Well, yesterday I tested the water in my tank and according to the reading its off the charts low. I am using an API test kit, so I think the lowest is 7.0 or something like that. My tank has a sand substrate, a lot of river rocks, a couple plants, and a cannister filter with foam and bio rings. Right now I am skeptical of the test kit, but its not expired and I tested three times in a row. Would the fact that its still cycling have anything to do with it? I am really confused, especially since I did a 75% water change last week, so how could the water ph drop so low so quickly?