In article , Larry Jaques
says...

http://search.ebay.com/Potassium-Per...romZR3QQfsopZ1
Will $4.99 do? 4 ounces or a pound, your choice.

Ya' got me, Larry. I've bought a bunch of stuff on Ebay, but I never
even thought of them as a source for chemicals :-).

Of course, it's $8 for shipping :-(.

I may go with the 3% solution, as I can spread the shipping costs for it
over a number of aquarium purchases. But a whole pound of crystals sure
is tempting.

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BNSF = Build Now, Seep Forever