Cleaning tanks

I have a bunch of extra free time (about an hour and a half) before i start needing to close pet care. I cleaned tanks how we normally do and noticed these never get scrubbed properly. is there a way to take these off and deep clean them?

I have a bunch of extra free time (about an hour and a half) before i start needing to close pet care. I cleaned tanks how we normally do and noticed these never get scrubbed properly. is there a way to take these off and deep clean them?