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Will a filter create enough oxygen. I was wondering if there would be enough oxygen in the tank for the filter. I have blowers but the bubbles dont go through the charcol they just go throught the top. Any help would be appreciated

I mean will the filter create enough oxygen for the fish to breathe.

What kind of a filter are we talking about here?
Generally, having water movement will introduce more oxygen into the water than bubbling air through it.

It is a cascade mechanical hang on filter. It is for tanks up to 50 gallons.

That may not be enough, if your tank is going to be reasonably densely stocked.
If you're going to bubble air, might as well stick in a sponge filter. A better alternative is to add an internal filter (something like a Fluval 3 or 4).
That way, you'll have enough oxygen in the water, plus additional filtration capability.

wherte could i get one of those my local fish store doesnt have any

Personally eddie, I would just get an air stone for your tank rather than spend the money on an internal filter. Sponge filters are cheap too, but IME they don't work well unless you get a big one and an air stone would be better at creating disturbance anyways IMO.

In my opinion a power-head with ventury system is one of the best way to increase oxigen level.
Bye.

Where could i stick the airstone without it looking obvious in my tank

try a bubble wall with suction cups...it has a better effect in my opinion

ben