I'm pretty new here but I've been in the pool business for 13 years. I ran into something new today and would appreciate some advice. I went to clean a customer's pool today and got a big surprise. No, there weren't any topless girls sunbathing around the pool. I discovered that they had covered a very large lawn with lots of fertilizer. When I started brushing the pool I saw that the bottom had a layer of the stuff. I'm concerned about a couple of things:
1. Iron staining.
2. Trouble with algae.
I'm wondering if I should just drain this thing. Any ideas? Water test results were as follows:
chl - 4.0
pH - 7.6
Alk - 130
CYA - 80
I don't have an iron tester since I've really never needed one. It's a salt water pool too.