so main drain broken and still plaster dust

Yes, a main drain is not required for a pool.
 
Yes but I was told that the dust collect and the chemistry doesn't filter right?

You should be using a pool cleaner to get dust and dirt off the pool floor. The main drain does not do anything with that.

Chemistry will be fine without a main drain.
 
Yes but I was told that the dust collect and the chemistry doesn't filter right?
No. Main drains aren't necessary. Your pool cleaner will collect any debris that settles to the bottom. Chemistry is unaffected.

Are you able to seal the main drain off and plaster over it?
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.