I have a similar bowl, it was home to a betta , but now its full of plants that were broken and I just threw whatever I found floating in my tanks are in there , I was thinking to put my new betta in there but it could be a bugger to clean. My wife loves this little plant bowl, she even takes care of it , even though it's low light ,, I've got some high Iight growing in there as well??? It's a funny thing I was thinking to hang it too and put my betta in it, but the cleaning might be a bit of a pain. I'll take some pics and post for you .
By the way it looks great!!! I think a turkey baster would help you clean, or a small tube which you can siphon out the waste water???[emoji6]
Clem