Yes, thats the primary difference between the 9010 & 9015. The larger cup has more height, which allows running more air and not getting a real wet foam.
I,m very happy with my 9010 and its great for a limited room/height sump area. It skims well. I would think it skims as well as a smaller beckett but of course one can drive them like crazy, depending on pump size.
I have had several becketts, several needle wheels and the various assortment of skimmers, most of us started with, trying to save money. My Tunze is as good or better than most of the ones I used, except for the larger becketts w/ Mag 24/Mak4 or Mak5 type pumps. Which of course only makes sense, with the amount of high pressure and volume of water being processed by them.
As for the sump versus in tank, mine does better in my tank but I only tried in in a sump the one time and perhaps never had it operating at peak efficiency. I may switch it back there soon and see.
The Precision Marine becketts are also top quality skimmers but a totally different aspect of skimming, with the obvious being larger and running larger/higher wattage pumps, compared with the low wattage and so far very efficient Turbelle pump in the Tunze.
If I ever set up a larger tank again, {150g and up}, I would go back to the becketts before a needle wheel and not be cheap on the pump. After seeing the difference in a 28in. beckett being driven by the Mag 24 or Mak 4 and then using a Mak 5, which darn near doubled the production. That would be my preference. But for anything else, I like the Tunze.
I dont know its upper end though. I would agree it depends on tank load and if its sps or softies etc. than can handle higher nutrients.
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Doug
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