Re: gas exchange

it will get better gas exchange being open, but should not pose a problem
with it mostly covered so long as it has a way to exchange air into and out
of the canopy.  do you have a sump to allow the gas exchange there?

kc

"Slim Shaggy" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> if i put a glass top on my aquarium about 1/4" above the water level will
it
> hinder the gas exchange? It won't cover the whole top, I need about 2" at
> the back for the wires and hoses and such..
>
> my water surface is pretty turbulant, but I'm wondering if having the
glass
> so close affects the amount of oxygen available to the water..
>
> thanks.
> ss
>
>