I think both ways are fine ,it's what you like.
Surely it what the fish likes/prefers?
OMG, IMO this is, i mite be being a bit of a prat here but i tend to keep my fish to the best of my ability for them to be happy as they would in the wild, i have never seen a sea bed or river bed with a glass botom.
sorry but i thought that the big fish keepers gave a s**t about the fish we look after, forget the folk that get the monster fish with small tanks with no thought of the size they grow but....
i like to try the best for my fish.
Ibelieve that sand is natural for their safety defences and for their enrichment of foraging for food, it has nothing to do with bacteria.
Btw....if the sand is constantly turned over (by the rays) that would actually be better for beneficial bacteria...think fluidized bed BUT filtration is not the issue here.
Rays will live on bare bottom, just do not agree with it IMO
yep

