Tank weight

[WarDog]

Can you beef up the structure?

[Mattyb]

In what way? Only way would be to take my 60gallon down and remove my laminate floooring and then the sheets of underlay to get at the joists. which I actually thought about doing. Then maybe sistering the joists.

[straightrazorguy]

The idea is to spread the weight of the tank over several joists. Sistering would help, but I would place the tank over a base spanning several joists. You can do this by adding a wider base under the tank, or getting between the joists with some blocking, so the joists work together. Add blocking or cross-bridging between 4-5 adjacent joists, securing it with both glue and screws. Or use Strong-tie bracing. If you can remove the plywood above the joists, you could also glue it before nailing it. That helps with the spreading of the loads...