Ok, I have a new question.
Would the regular Remora Aqua C be enough for a 75 gallon tank with a heavy bio load? I'm hearing so many conflicting stories about this skimmer: some say it's for 50g or less, some say it's for 65g or less, and others say it's for 75g or less. If it's too small for a 75 gallon tank, what about the Remora Pro would make it more efficient? I would think that as long as the collection cup is emptied frequently the regular would work for me, but I'm no expert. The Remora Pro hang on is extremely hard to find on ----, where I do most of my shopping.
As far as the Seaclone 100 and the Seaclone 150, the only difference I saw in the two was the size of the skimmer body. I'm not sure why a bit of extra plastic would make a difference in efficiency.