Hailea is usually pretty crappy i think. The Waikato aquarium soc had a large hailea air pump to use at the fish show, but it was way too noisy and they had to get another one. Trying to steer clear of them, but i dont think the two i linked would be much better..... Mind you, you should hear the amount of noise the air pumps in my room at the moment make. 3 medium sized pumps to power my killie tanks, brine shrimp hatcherys and water ageing barrel is not quiet, but i still sleep well I just need more air!