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Try going to e-bay and doing a search for perastaltic pumps. Check the spelling, but I think it is right. There are quite a few on there, and some nice ones auctioned off by tanksalot. He basicly takes hospital surplus IV pumps, and refurbs them. Some of them also have float-valves attached so you can use it as a top-off for a sump or whatever. He also has some that are for exact dosing..like when the bottle says '235 ml per day per 10 gals', you can program it to dose X ml over a 24 hour period.
Hope that helps!
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Wisconsin Reef Society Member
<a href="http://www.thereeftank.com/forums/showthread.php?s=&postid=22919#post22919">My Specs</a>
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