To answer the first question about whether the filter capacity is too large for a 60H- If you agree with the school of thought that more filtration is only a good thing, then no not at all, I think it's perfect for a 32gal.
As for the second question, a 16/22mm hose diameter is the largest of the three common sizes used with canister filters. The 16 refers to the inner diameter. The 22 refers to the outer diameter, so that accounts for the wall thickness of the hose. a 17mm lily pipe is what would be used with it (a nice tight fit). Will it be too large looking for a 60H. I personally think it might.
My personal experience with this:
I have a Biomaster 250 on a 60p (17.1 US gal). And I love it, but I've have had to reduce the flow on it. The filter itself allows you to do that but another way I help restrict it is by using a smaller size lily pipe than what the filter calls for. People commonly do this and it's perfectly fine for the filter. How you would go about this - You would have to get an adapter for both the inlet and outlet hoses that converts your hose from 16/22 to 12/16 (added an amazon link to an example). You can find them even cheaper at hardware stores, but they won't have the little finger grips. You can also do this with a quick tap, though that's harder to find. There are some brands that have two built in diameters (link #2) or with brands like JBL, you can combine a 16/22 with a 12/16 and make it yourself, though I've never been able to find them in the states. This may be possible with Eheim ones, but I don't have any on hand to try out. Finally one clever option that I saw George Farmer once do is to take a centimeter length cut of a 12/16 hose and slide it onto the bottom of the 13mm lily pipe. Now you have a 13mm lily pipe with a 17mm connection point. I attached a photo of my 60p doing just this. The benefit of this route is that it's cheap and easier to clean the hoses since without an adapter in the way. the downside is the hose portion will look slightly larger.
adapter example:
Amazon.com : ISTA Hose Adapter 12/16mm & 16/22mm - Connect Converter Filter Pipe Aquarium : Pet Supplies
www.amazon.com
quicktap with 2 sizes built in:
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