Raul, that thread wouldn't open (for me). Just for the record, the Eheim surface extractor works great, BUT, its only rated for a 200GPH filter and needs to be coupled to the existing intake with parts. That is the boogie here. Its kind of funky to set up that way with changes from small Eheim hose to the standard 5/8 hose. I can walk you through it if you want to PM me. Big Als sells the parts. I have them all laying around with a "retired" surface extractor. I may use it with the Ecco on one of my small tanks, but I may sell it myself, if I get around to it.
That said, the Eheim S extractor would be perfect if you had a little second dedicated Eheim Ecco filter or the like - just for the extractor. I actually liked the design. Too bad they don't make one for bigger tanks.