its a nice tank, i do not trust on the under gravel system, i have 5 other filters hooked up besides. but great mec filtration.
my theory of filtration..yep it may be too simple ,but here goes....ammonia ..0 nitrites ..0 nitrates..20-30 ..or less ,,,do you like the way it looks ?... if yes , you have great filtration..if no get more (or different) filtration...the idea to me at least that a certain type of filtration is inherently better than another is absurd.. for example , the only reason I wouldn't do ugf is filter maintenance( cleaning under the plate),, everybody does canisters ... but a leak or a broken latch can be expensive and more inherently dangerous to the fish(lots of people use these filters solo,because they are "better") ,, so to sum it up whatever works is better,,,imo