Standard All Glass 210g

pencilcup

New member
I am having a Standard 210g from all glass. Currently the tank uses 2 sets of Megaflow overflow kits. Could any one please tell me exactly the size of the holes on the bottom of the tank? (I want to maximize the flow by buying biggest bulkheads that could fit into those holes)

(I searched on the internet but couldn't find it. Everything is in position so I couldn't measure it by ruler.)
 
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