Calculating Time to Run the Pump

[PoolDesignnet]

Need more info from you....
16' x 32' freeform? rectangle?
3' to 8' depth. Do you have a 5' break?
Need the above info to figure out how many gallons.
What size / brand /model pump do you have? (need this to find out the GPM)

[Awry13]

Need the size of the plumbing too.

[waste]

As a cheep and 'no math required' way of doing this, just cut back the pump run time by an hour every few days and see how the pool looks. When it 'turns' nasty, go back to the previous run-time (after treating the 'nasty'), this will save you a bunch of computations which may or may not be right.