i found out the fluval is 11gph..is that enough?
I think you mean 111 gph....with media inserted, canister filters usually push fewer gallons than they're rated for. I would guess with the 203 that you'd be turning your water over 2x per hour. you might want to put a smaller HOB on the tank as well.
also, I took another quick look at the pix....tank and cabinet look pretty close to the wall. I suspect that you took the pix before setting the tank in it's final spot. make sure you leave a few inches between the wall and your tank on each side (before filling) as you'll need the space for hoses, heaters, etc.
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