I just replaced the guts of my toilet with a fluidmaster replacement kit (fill valve, flush valve,etc). Everything seemed to work just fine. But I noticed that the water level in the tank is rising very slowly. As an example, I flushed it about 2.5 hours ago and the level in tank rose about 1/4" - 1/3". After flushing, the tank fills properly and shuts off, after which I hear no sounds at all coming from the fill valve or anywhere else. I hung out in the bathroom for 15 minutes to see if I could hear anything, but I don't. I'm at a loss. Any ideas?