Thanks all and merry Xmas! I am using Black Diamond 40-60 blasting sand. It definitely doesn't appear to be too sharp and I researched feedback from other Cory owners before buying. There does appear to be some reflection on that side from my perspective but I can't tell if that's what they are ...

Hi all, I've got a 90G tank and I'm pretty happy with things, except that my 4 Sterbai corys won't stop pacing up and down the side glass like maniacs. Can you tell me if this is normal, what I can do, etc? As a quick note, I plan to get a few more sterbai corys, but the LFS ran out so i bought the ...