[Gooserider]

I would ask, don't know if BillA will answer, exactly WHY the prohibition and what is the failure mechanism if that is the reason? I am purely speculating here, but my understanding is that aside from running on 12V, there isn't anything that spectacularly different between the Swiftech pump and other good quality units.

So I don't see what the problem is that would make Swiftech pumps sensitive to pigments, but not other brands of pumps. (Or do other brands also prohibit pigments?) It does occur to me that the reason may simply be that the pumps aren't tested with pigments, and Swiftech doesn't want to take any chances on pumps run with untested stuff (do they restrict other materials as well?)

If the pigment prohibition is common to many brands of pumps, then the answer may be the same as you get when doing almost any other mod - void the warranty....

Gooserider