Dolphin 5 Star air pump. It is running my 15 tanks all with sponge filters &
it is extremely quite.

http://www.wonbrothers.com/product/a...p.htm#fivestar


"Billy" wrote in message
...


"Gill Passman" gillspamattaylorpassmanspam.co.uk wrote in message
.. .


I've witnessed the noise from those with external pumps and these were
not
for me...



Agreed. At my max of 10 tanks, I looked into an external, central air
pump. The noise, coupled with the air lines all over the place convinced
me to simply buy smaller pumps. Rena pumps are fairly inexpensive, very
quiet, and reliable, too.