Went on vacation and the person watching our house did not care for our pool. Came home to a dark green disgusting mess. Been working on it for about 4 weeks now and it's still green although we can almost see the bottom.
Here are our numbers as of today
Free chlorine- 6.03
We have replaced the sand for our filter. The pool store where we've been getting our numbers checked is trying to convince my husband to once again replace the sand with sand from their store. My husband used the pool filter sand from lowes and seems to think maybe the filter is not working because the gauge is reading 18?
Please help! He's getting frustrated and seems to want to follow the pool store and I've been saying no because we already tried it and it's not working. They are telling us our numbers are fine yet I'm looking at a green pool!