Sorry didn't see the response before the husband came home and helped me open the filter. What I found was 4 large filter cartridges, kind of like the type A/C ones I put in my little intex filter, but MUCH larger! They were filthy so we hosed them off and put them back in, and ran the filter for about 6 hours last night. Major difference in the pool quality this morning. The landlord told us she'd purchase all the supplies needed for self maintenance since my mom had relieved the pool man of his duties.

I'm curious though. To measure the width and length of the pool, it's not a straight shot. It's in the shape of this symbol >, with a spa on the corner and diving board in the deep end. So do I just measure the longest portion, like corner across to corner? The depth is not marked but I think I can ask the landlord when I see her again.

And thank you for your kind words regarding my husband's service. He has been an active duty Marine for 23 years with no plan to get out until they tell him he has to get out LOL. This is by far the hottest place we've lived, thank goodness for pools!