Aquarium concrete floor

[Dragontis]

Hi all, I am planning to upgrade marine tank from 120 litres (32 gal) to Red Sea 350 or 425. I live in a flat (second floor) with a concrete floor. Not sure if I will get any problems with the floor. How big tank you think I can get without floor issue ?

 

[lucyretz]

I would just put it on a weight bearing wall and make sure its level. i have a redsea 250 on the second floor of our extremely old townhouse and its alright.