Hi Steve,
I already used FWE (and have done so before several times with great results).
As for the Blue Velvet. They are beautiful creatures, but have a very short life span in aquariums, and do not do very well in high flow. I had 3 of them in my old
75 gallon tank when I had a serious case of the flatworms. They are amazing to watch, and would eat all day, but they will never get every single one, and would get blown around by my mp40s.
It's a no win situation; either they eat all the flatworms and starve to death, or they don't get all of them, in which case once they die, flatworms will take over.
Just my 2c. I actually wanted to set up a small tank with one of the blue velvets, and keep feeding them from another tank, but it would be a lot of work.
I do agree with you that dumping chemicals in the tank is not fun for anyone though...