do fish like glass tile?

this is the 8mm (double thickness) glass mosaic tile; $8.88 a sq ft from ebay. do you think the fish will like it?

the "tile guy" at work

back when we had all the bathrooms tiled here at AustinModHouse, I had selected a gray grout. our professional tile guy asked me why I wanted grey. he assured me I was wrong and that white was the correct grout choice. I now believe I should have stuck to my first choice. the white grout shows up too bright and takes away from the color and depth of the tile. I see the grout as a grid with the white grout.
I used gray grout for the koi pond and I think it looks fantastic. will seal the grout tomorrow and should be able to replace the water, tadpoles, snails and mussels by tomorrow eve.

he has teeth.