Semi auto water change - help

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Originally Posted by LEG-IT

Hey brad, just wondering its the design similar to Mat's one?
http://thefishcave.com.au/diy/waterchangers.html

if it is, shows how ya can make it lol, thought it would be handy..

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He just has the U-bend with the hose connected to the end - no other plumbing added to it.