ok, kids, i've got two questions about my flourescent green open brain:
a) i've noticed that during the day it inflates. and by inflate, i mean that it looks bloated as though someone is pumping it full of air or water. i'm convinced that taking a pin to it would cause it to fly around the tank like a popped balloon.

it then deflates back to its regular size when the lights go off.
is this normal?

it looks otherwise ok and it still has its original coloring and will eat when offered food.
2) where should it be placed in the tank? right now, i've got it fairly high up in the tank under 220 watts of pc lighting- 110w of 10k and 110w of 50/50. i'm in the process of upgrading my lights by building a canopy which will house both the 220w pc lights and the 440w
vho lights i just bought.
most tanks i've seen (or at least the tanks i've seen pictures of

) place open brains low in the tank, usually on the sandbed. i've avoided doing this to keep sand out of it but i'm happy to move it lower in the tank if that's where it should be.
thanks in advance.
-hayday