Does my pool filter need new sand?

[MickeyD]

Is it safe to operate the pump with the lid open?

Sand filter lid, yes, for short periods of time and only on backwash....

 

[ElecEng]

Prime your pump, by opening the lid and filling with water. Run for a bit. Repeat.

 

[The_Mowgs]

What would be the best sand to use in the filter where there is a lot of dust in the pool?

 

[manesan]

What would be the best sand to use in the filter where there is a lot of dust in the pool?

Would also be interested if anyone has any info on this. Ive had to to use Floc every couple of months which is a huge pain.