I will happy just to get more water in the tank. Before we changed out the Fluidmaster for a new one we had more water in the bowl.You mention you need more water in the "bowl", but you also seem to use "tank" and "bowl" interchangeably. You can regulate the water in the tank which is behind the toilet, but the water in the bowl which is the part you sit on, is pre-determined by the weir, or trap, built into the bowl. You can not change it. When water is added, it goes over the weir and into the drain.
Terri