Just did a test of my water in my empty cycled tank and the ph has gone right down which is a bad thing for me as I am planning on keeping cichlids. All through my fishless cycle my ph was stable at 7.5, it has been cycled for over a week now and I have my fish coming next Tuesday so I have time to sort this issue out. Here's the results of my water tests: Ph: 6 Ammonia: - Nitrite: 0 Nitrate: - KH: 200 GH: 0 As you can see my ph has dropped also I didn't get a reading on my GH, I did 2 tests same results. So the only thing I have added to the water in the last week (apart from ammonia) is Tropic Marin pro cichlid mineral which is ment to keep the PH high and I was guessing the GH. Any help any advice would be much appreceated as I have 10 cichlids coming in 1 week.