I have the BIO 2000 and YES it's 17yrs old,(Impossible to find ANY original filters these days),I stumbled upon this filter a few yrs ago and have used a JUPITER filter to replace my now unobtainable filter, just keep the small cap (white one on top) and modify it by cutting the middle out (10mm) then pop it back on and it will fit the BIO 2000 machine; hope this helps another who's still using the BIO.