For years i had my bichirs on some fine gravel. You guys said i should use sand. I use sand now in my new bichir setup. Now i put my bichirs in their new home and what happened?! They look like they are covered completly with sand! Only their face and fins are free of it! I hope thats just because the slimecoat was disturbed when i put them from one tank in the other...will that shred??? I heard you guys and now such a stuff happenes! What if my bichirs die now? I have most of them since years.