George Posted January 13, 2016 Report Share Posted January 13, 2016 Thinking about putting a sump on an old 130 gallon I have thats been out of commission for a couple years. I have watched on YouTube about drilling Tempered glass. Anyone successfully drilled one? Any tip? Any tips on sumps in general? Thanks Quote Link to comment Share on other sites More sharing options...
jvision Posted January 13, 2016 Report Share Posted January 13, 2016 I've never drilled tempered glass, but are you sure it's tempered? Most big tanks don't use tempered... just thick! I've only seen tempered stickers on small tanks with very thin glass. I've drilled lots of tanks. Get a jig to hold your bit steady as you're starting the hole, I've used veggie oil or running water to keep the bit cool. Good luck! Quote Link to comment Share on other sites More sharing options...
RyanT Posted January 13, 2016 Report Share Posted January 13, 2016 I recommend drilling multiple holes so you can use a quieter overflow arrangement (Herbie?). You could also drill the side/back if you suspect the bottom is tempered. Quote Link to comment Share on other sites More sharing options...
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