achansek August 14, 2019 Share August 14, 2019 I am planning to add a HOB overflow to my 75g tank. Was wondering if they are reliable. Any other brands that you would suggest? Link to comment Share on other sites More sharing options...
YHSublime August 14, 2019 Share August 14, 2019 Why not drill an overflow box? Link to comment Share on other sites More sharing options...
madweazl August 14, 2019 Share August 14, 2019 I used the hang on styles for at least 15 years without issue but drilling really is easy as can be (provided the glass isn't tempered). Link to comment Share on other sites More sharing options...
achansek August 15, 2019 Author Share August 15, 2019 I bought the tank off of CG and the owner did not know if it is tempered or not. Link to comment Share on other sites More sharing options...
madweazl August 15, 2019 Share August 15, 2019 There are many [url= ]youtube[/url] videos that can show you how to check; basically, you take a polarized set of sunglasses, place a laptop or cell phone in the aquarium, and rotate the sunglasses to look for striations in the glass. If it has them, it's tempered and if not, you're safe to drill. Link to comment Share on other sites More sharing options...
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