Garden tub converted to indoor garden?

I have a "garden tub" (oversized and separate from the shower) in my master bath which is a total waste of space. This may sound crazy but I would like to turn it into an indoor garden/planter space with potted plants and maybe a small water feature like a fountain or water fall with a pump to recycle the water ....???? I'm SURE my long-suffering husband will think I have gone totally over the edge, but could I get some other opinions, please, even if you agree with hubs. All ideas, suggestions, cautions, fed back welcome. THANKS!

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