于 2004-01-03 21:05 Hi every buddies I like to add a new external filter for my tank. Eheim 2211, 2222 & fluval 104 are the candidates.. My tank is a 200L RT but w/ about 13 small fishes. My tank filtration :UGF, eheim 2222 & one NO3 remover (DIY). The aim of the new filter is to replace the 缸頂滴流. Any recommendation??? The sales told me I can use the 2211 w/ Bio-ring only in order to produce more bacteria. Is it a good idea??? Thx