Thought I would share this with everyone incase anyone is looking for a cooling fan for their tank...This morning I found an old playstation 2 for $3 at a garage sale...I opened it up and it had a perfect cooling fan..It was about 40mm and was 7v...although the wires were alittle small that can be easily delt with...So if you have an old ps2 you wana through out now you no where to get a good cooling fan...