Just in case you are unsuccessful in returning your orb...
Biorb sells a bubble tube guard just in case you have fish likely to take a tube dive.
I have a betta in my orb. When I set up the tank for cycling I could feel how rough the ceramic media was. I covered it will a layer of polished stones similar to most of the ad photos, this served to protect my Betta's fins.
A few months later I converted to Biohome gravel and ditched the Biorb media.
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