We have less than 10 year old toilets, they're elongated bowls. They do OK with flush performance.
The trouble is that the water level and bowl design makes only a 4 x 6 inch area covered by water. In other words, the front 2/3rds of the bottom of the bowl has no water over it; and we get streaks!
The level cannot be changed - it's a function of where the trap or weir is molded into the toilet.
I've noticed at home centers that there are a few toilets that advertise their "Water Surface Area" - but only a few, and I cannot find it on a spec sheet.
Is there another specification I should look for? Or do I ask them to allow me to fill each bowl and see where it settles?

Thanks, jz