Once the stand is level, place a sheet of polystyrene on the stand or plywood if used. This will act as a cushion between the tank and the stand.

Any irregularities on the surface of the stand will create pressure points on the base of the aquarium. These pressure points will stress the glass and cause the tank to crack without warning. The polystyrene guards against this. A few pence spent here may save hundreds of pounds should disaster strike