I have two Wesophyllia in my 29. When they swell up they take up half the tank. I have had them for over three years in different tanks. I do not have a skimmer in this tank all I do are water changes. And when you do a water change and you can not tell which bucket contains the old or the new water I consider my aquarium water too clean. So what I do is take 5 gallons of water from my 200 and do another water change on my 29. It seems to make my Weso's happy. If you are wondering why I don't move them into a bigger tank, they don't like anybody so I created a tank just for them.