I found waterfill can't be placed on SE Agni (cuz no water on this planet),this is well balanced.
There is another problem,I downloaded Factorissimo2,the waterfill can be planced in factory,which means I still can gain water on any planet if I have a factory with waterfill and water pump,this may break balance for SE.
I guess this mod can add an option to prevent placing water on factory floor.