as others have said place if possible opposite of any return flow into the tank with a small space like you have you wont have to worry much about too much dead space with an adequately sized powerhead it will aerate the full tank as long as there isn't an obstruction like rock on the glass
Experiment find the best option for your tank you might be surprised where the best flow might be
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 My aquarium is nothing but a smorgasbord for my cats.....
Last edited by Dearth; 03-02-2015 at 09:47 AM.
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