Sand not used for filtration after cycle 100

oh, sorry it's not a bug... I confused sand with sandstone.................

So, the real question is : What can we do when we do not have sand anymore ?

I just hit 100 and started having and issue with my new Secondary Filtration System, Haven't had any issues up until then. They just won't do it lol no matter the time waited, lack of tasks and or priority level and I have plenty of sand lol.

Edited March 13, 2017 by Pancakie

'not pumping' is usually the code for the output not being connected.