No more swimming
Look, we totally understand an apartment’s facilities are for the tenants only. Washing machines and driers are only for paying tenants, even if they have to put in a few coins to use them. This goes the same for the pool. If you live there, only you can enjoy the pool during swim season.
This crazy landlord was fed up with darn neighborhood kids making his pool dirty, so he punished everyone, paying tenants included. He stopped maintaining the pool, leaving the water green and viscous with algae and bacteria. Since it would cost the manager more to maintain the pool, he felt that nobody should enjoy it. Good thinking!