5 gal for 80 would be great but I am not in the pond community to find great deals like that. For me it would still be the 259 price. No insult ment by that Cecil. But I couldn't find a deal like that on chemicals if I tried. The Zep idea sounds logical but still alittle on the scarey side. If it actually worked I would consider it. Why pay more if in all actuallity I might not have to. Thanks for the comments so far. I hope to have enough info to treat next week.