Loud Intex pump

[GreenEnvy22]

Hi all,
I have a 16' above ground intex pool. Has the sand filter and a pump that pulls about 200W (model SF90110T).
I have no idea how old it is, we bought the pool used about 3 years ago. It's been working fine.

Last week I shocked the pool (to about 8ppm), and a day or two later, noticed the pump was much louder. I don't know if it was coincidence or not.
The motor used to just make a whooshing sound, but now it's making a loud buzzing. It's still pumping at what looks like the same rate, PSI still the same as always.

I took it all apart, didn't find anything in the impeller. Spinning it by hand, it wasn't hard to spin, but it also didn't free spin at all. I did notice I could see the impeller was slightly out-of-center. It was barely noticeable, but you can definitely see it.

The impeller on this model is a round disc, with some internal veins (rather than the sprocket style).

I didn't know if I could just pop the impeller off the shaft by pulling on it, or if I would wreck it, so I just put it all back together, and it's still making the buzzing.

Anything else I can do/check? or just run it until it dies?

Here is a video of the sound.

https://youtu.be/rl_MROTAXLo

[Denniswiseman]

Probably a bearing going on the motor
To remove the impellor you need to expose the shaft opposite end to the impellor
Use a spanner to hold the shaft and twist the impellor off
Sometimes you can get replacement motors