good HOB skimmer?

[canadawest]

U have a 30g sump, so why the need for a HOB skimmer? Most in-sump skimmers are superior to HOB types. (This I know from personal experience with both)

While I personally haven't used one, I've read several great reviews of the Tunze DOC skimmers. The 9005 is a HOB while the 9010 works as both a HOB or in-sump but is more powerful. The 9010 will be my next skimmer upgrade (over my current Red Sea Berlin Classic)

Originally Posted by kwirky

What's a good HOB skimmer for say... a 30g+ bioload?

here are some I've found.

http://www.jlaquatics.com/phpstore/store_pages/details/skimmers.php?product_ID=DD-P0300
http://www.jlaquatics.com/phpstore/store_pages/details/skimmers.php?product_ID=ps-bp2r

It'll be for a 30g tank with a 30g sump/fuge. I think the backpack would be enough. how much does water a rising/falling water level affect these HOB skimmers?