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I am having a hard time finding a good quality 4-ft 120 so I've decided to just buy a new one. However I want to go with a regular tank that I can drill and add external an overflow. I believe the additional space I will have from not having internal overflows might make it more adorable? However I know nothing about external overflows except for a few things I've heard you guys speak about here so I wanted to get some suggestions. Especially from those who have already done this. Beat information like what tank did you go with how much did it cost? What overflow did you buy and why? Did you drill it yourself? Stuff like that