I forgot one question on the 2217. Is it like just a glass tube and the filter media just gets layered in it? (no trays) If so how do you clean it with out destroying the Bio?
Can a heater or UV be added in-line with the hose on the FX5 & 2217 like the XP3 or XP4?
Can a heater or UV be added in-line with the hose on the FX5 & 2217 like the XP3 or XP4?