How to fix "flex" in the bottom of a bathtub

[udelslayer]

Well then, perhaps this is all pointless and I should just focus on correctly installing the new tub in two months. I'm looking at those sterling vikrell units. Do they hold the mustard....if I were to fill the tub with it?

 

[Cacher_Chick]

Well then, perhaps this is all pointless and I should just focus on correctly installing the new tub in two months. I'm looking at those sterling vikrell units. Do they hold the mustard....if I were to fill the tub with it?

They are not as durable as a standatd cast iron tub, but they are decent when installed in mortar bed. I have done the showers which are made of the same material.