Help with leaking Toto Aquia

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brookswithbrooks

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My water bill spiked and a dye test came out with color in the bowl of my Toto Aquia (Two Piece Model #CST412MF - Tank #ST412M). It is an older Toto Aquia, installed about 2012.

Note: I am not handy.

After reading up, I learned that the most likely culprit was the flush valve gasket. I got the replacement and installed it today…but it still failed the dye test.

Now, the whooshing sound it was making after flushing is worse.

Any sense on what the next step is?

Video of the sound it is making after the new gasket was installed is attached.

Thanks in advance for any advice!
 
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