I recently installed identical toilets in a rental property. With the tank refilling to the fill mark, the level in the bowl is reached early and then overflows down the drain wasting water. I lowered the tank fill on both to about an inch below the fill mark and that made the fill stop at the correct bowl height for one. The other I placed a pinch valve on the bowl re-fill line to reduce the flow and now it fills to the correct bowl height. Both toilets 'seem' to flush with the same force as before. Is there any problem having the tank fill level an inch lower over time? Wondering with less flush water the toilet may clog or degrade quicker. Comments?