Using heavy aquascape rocks on store bought tanks

[Imran #786]

So I went foraging for some rocks to use in my aquascape and came across a gem but I feel it may a little on the heavy side for a store bought stanfard 60p tank.
I think it is around 4mm thick.
With this in mind given the rock is in-between 5-7kg in weight, would the tank hold this weight or have I bitten more than I can chew?
I really love this rock as a main stone which I can build around...

 

[hypnogogia]

I’d put some plastic egg crate on the bottom and place the rock on that.

 

[Imran #786]

Thanks... i eas thinking of using a piece of yoga mat. Maybe I'll add them both together

 

[Tim Harrison]

I use 20mm - 30mm polystyrene. As well as offering a good level of protection it also raises the scape so it doesn't become drowned out by substrate, and retains tension.

 

[Imran #786]

Excellent... thanks