Stircrazy,
That might be the case if it were an average system, average size running two skimmers rated for that system. Dave's system is 1500 gallons, most of which are stocked and a lot of live rock thowing off detritus. The system has been underskimmed in the past, IMO, so there are plenty of organics to go around, not to mention a lot of fish in one of the tanks.
Given that these skimmers are rated well under the system size and the fact that the system is a very mature system, I do not foresee any problems for the first few match-ups, time will tell.
And actually, if you look closer, two of the skimmers out of the three are producing quite well and have throughout the week. The only one that did not seems to be an anomoly in many ways.
Hey, the system is there, the skimmers are there,let's test and see what happens. It's just for fun anyway.
Heinz - I agree with you that all of the people actually physically on-site making adjustments should be allowed to post in the aforementioned thread.
Mike