I bought a zippo fan from office depot. It has cloth blades that can be removed and washed, and this thing really moves some air. It cost me $20, but it's the best fan i have as far as flow goes out of 5 on various tanks, and if you get your hand too close it doesn't get ya lol. It blows huge amounts of air too. It dropped the temp on my 90g by 6* quick.