Yes I do have both of those tanks and to be very truthful I do not hear my Eclipse 12 at all. I would call the manufacturer (get the customer service number off of
http://www.marineland.com.) Hopefully you registered your tank when you bought it so if there is a problem you can get some free help but I will say that they are very helpful and will do what they can for you. I would just tell them that the System 12 runs loud and they can give you some clues to see if it can be fixed so as to run quieter. I think if you compare it to the Hex 5 in noise level they will know what you are talking about.
The call may take a half hour but you should not have to wait that long as they do get to you pretty fast. I had trouble with a hood on one of the Hex's a year ago and they sent me a free hood.
The Hex5 light bulb does need to be replaced and if it is white light you want, the bulbs at Walmart are probably the best but be prepared what ever bulb you use to have some algae to clean off the walls. I would get the Mini Fluorescent Bulb at Walmart as it is white light and not the 50/50 which is made for saltwater tanks and will really give you algae. This is easily removed with a piece of filter floss and a slight (not hard) rub on the tank walls when you do a water change. I use the Colormax bulb as it enhances the fish colors and tank colors but it does give a pinkish glow to everything.
Rose
