Question AIO pump making weird noises ?

Apr 13, 2021
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Hey there,
so I have been running a DEEP COOL Castle 240 EX AIO in my system for about three months now, and about 3 weeks ago I noticed, that my pump started making weird noises. At first, I thought it would be my hard drive, since it sounded pretty identical, but it actually wasn't. I tried unplugging my pump for a short time, when booting up my computer and the noise wasn't there anymore. I already searched online for help, but didn't find anything useful.
I tried filming it:

Is it normal ? Can I do something about it, since it's pretty annoying?

Thank you in advance,
Hubit
 

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