We are renting a house with a painted pool from 1940. The filter at the bottom no longer works because they closed off the pipe. I placed something over the hole so debris didn't enter the water. The pool has mustard and black algae. The pool guys have given up on it because they say if we treat for algae it will be back in a month because it is a painted pool. They say we should get a Kreepy Krawler pool cleaner and that is the only way to keep the algae down plus once a week cleaning from them. The pool always looks a mess. We can brush and vacuum and the next day the algae is back. The chlorine is high and PH is 7.2. They throw chlorine tabs down on the bottom of the pool along with a floater. Don't really feel comfortable with my kids swimming in a pool that has 10 tabs on the bottom just sitting there. Should I be worried? This pool is a pain in the arse and it seems that the pool guys have given up. The owners refuses to replaster the pool. Is this pool a lost cause? Is there a way to get rid of the algae and keep it away even though the pool is painted. Any advice would be great. Thanks.