Hi DiYwifegetsitdone,
Thank you for your feedback on the C43913-WH, and I am sorry to hear that the unit is not what you expected.
The fill valve assembly inside the tank can be adjusted by following the instructions found in step 2, page 2 of the Maintenance and Installation manual below.
https://media.deltafaucet.com/MandI/82487%20Rev%20F.pdf
Since the toilet is only designed to use 1.28 GPF (gallons per flush), you may also hold the flush lever down for a few seconds longer to allow for more water to flow through the tank into the bowl, which will help to clean the bowl and still conserve water
Please contact us back with any further questions.
Best regards
Nicole
Digital Communications Specialist