Air Pump

I just need advice on what would be the best suited air pump to run in a 45ltr tub. This tub is the res and I want a good flow of air/bubbles.

Thanks in advance.

i have heard that the actual wattage of the pump is what makes all the difference. maybe try something like this

http://www.amazon.com/Hydrofarm-AAPA45L-20-Watt-45-LPM-Commercial/dp/B002JPRNOU/ref=sr_1_12?s=pet-supplies&ie=UTF8&qid=1354494749&sr=1-12&keywords=air+pump

its a little pricy but will leave room for upgrade later on

Thats pretty similar to what I have been looking at. Thank you for your reply.