markvo Posted September 12, 2014 Share Posted September 12, 2014 I want to change the overflow on a tank. It currently has a small corner overflow and I would like to have a larger one. I can remove the corner overflow and block the hole, but then what are my options? Do I have to route out comb slot in the back wall and add a long box? What would you recommend? Quote Link to comment Share on other sites More sharing options...
matty Posted September 12, 2014 Share Posted September 12, 2014 Is there 2 holes drilled in the bottom? Why do you want a larger one, more flow? Quote Link to comment Share on other sites More sharing options...
pledosophy Posted September 12, 2014 Share Posted September 12, 2014 Glass or acrylic? Quote Link to comment Share on other sites More sharing options...
markvo Posted September 12, 2014 Author Share Posted September 12, 2014 Just 1 hole and it is 1/2" acrylic. Quote Link to comment Share on other sites More sharing options...
wanareef Posted September 12, 2014 Share Posted September 12, 2014 Just cut a oval slot out and add a box on the back side then cover it up with gutter gard to keep everything in Quote Link to comment Share on other sites More sharing options...
pledosophy Posted September 12, 2014 Share Posted September 12, 2014 Do you have a router? You could just increase the size of the exsisting drain. Either way I wouldn't patch it I would plug it if you do a new hole, just a bulkhead closed on the back. You never know when plans change, or you need an easy eaer change valve or whatnot. I had a 65g that I put an internal overflow box in by drilling the back and running the duroso externally. Quote Link to comment Share on other sites More sharing options...
pledosophy Posted September 12, 2014 Share Posted September 12, 2014 Do you have a router? You could just increase the size of the exsisting drain. Either way I wouldn't patch it I would plug it if you do a new hole, just a bulkhead closed on the back. You never know when plans change, or you need an easy eaer change valve or whatnot. I had a 65g that I put an internal overflow box in by drilling the back and running the duroso externally. Quote Link to comment Share on other sites More sharing options...
TheClark Posted September 12, 2014 Share Posted September 12, 2014 Happened to run across this thread. This guy put a coast to coast into an existing aquarium, kind of interesting: http://www.reef2reef.com/forums/member-tanks/95851-island-reef.html Quote Link to comment Share on other sites More sharing options...
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