On my 112L tank runs a Eheim 2222 with which I am satisfied. For the 200L tank it then turned to me again the question which filter I should take. The choice fell on the Fluval 306, if only because of the built-in suction. This is but a significant service advantage over my Eheim Professional 2222nd The housing of the Fluval is made of unbreakable plastic, the lever locks easy to operate, here, I like the Eheim with its 4 closing levers but slightly better. In my opinion, better than the Eheim are the following ... Larger hose diameter, hose kinking not soon also they are once placed outside the pool and additionally screwed compared to the Eheim the 2 point, the plugging of tubes required, ie one point more where it can leak, also lack the additional screw in Eheim. The hoses are also better corrected when Fluvial, the Eheim everything is more energized and more difficult to install additionally. Points that is something better like the Eheim the accessories available, so a bit more flexibility, and the filter baskets without the filter mat standing of Fluvals. In volume compared to both receive nothing, the Fluval is perhaps a little quieter than the Eheim 2222nd Both filters provide me fully satisfied. Because of the hoses, fewer problems during installation, start-up, even after a filter cleaning, but I would give preference to the Fluval during a new acquisition. The Fluval runs its 6 months and 2 filter cleaning without any problems. *** After about 2 weeks run-in period of the Eheim 2222 is now but a little quieter than the Fluval 306, which still quietly does its job. Although the comparison is The Fluval 306 keeps my 200L better clean than my Eheim 2222 the 112 L tank. As before, I am very satisfied with the Fluval 306.