I am thinking of purchasing a UV sterilizer for my 55gal tank to use in conjunction with an eheim 2217. Has anyone had experience using the sterilizer found in this link? I'd rather not purchase an expensive (>$60) sterilizer knowing that I won't need to run it all the time. Any suggestions on which sterilizers are good (irregardless of price), I can always try to find it on ebay for less than retail? Thanks in advance.