Remember when you set your tank up it had to cycle and build up beneficial bacteria? First you get ammonia, then nitrites, then nitrates to show how your cycle is progressing. If you don't have any test kits for these things I strongly suggest getting an API master test kit and start monitoring your water. Do you even know your tanks Ph? When you moved the tank, depending on if you dismantled it or just lowered the water level and moved it as is could have cause the loss of some beneficial bacteria which would need to rebuild up again which means the tank would go through a mini cycle.