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Michelle5859
Good evening, everyone. Slowly but surely, I am moving towards increasing the volume of the aquarium. The size of the aquarium, which I managed to negotiate with my wife, is either 1250mm x 450mm x 600mm or 1200mm x 400mm x 700mm. I am definitely leaning towards the first option. I will be ordering from Aquatika and want them to make the holes and install the overflow system for me right away. Now the question is, what dimensions are necessary for the overflow system to be convenient to use, and what height should it be? Regarding the holes, I want to make three: for return, drain, and emergency overflow. What diameter do the holes need to be?