My pool is milky and I cant clear it?

I too had milky water in my pool. I also have a chocolate lab dog who loves the water. I found that with allowing the dog to swim would turn the water milky and that a "slime" would develop on my filter and in my filter housing. I can't deny the dog but I can limit the number of swims. My pool is small so it's not hard for me to fix. I change the filter or clean it real well every day for a couple of days following one of her swims. I also heavily "shock" the water at the end of the day for 2 days after her swim. If the cause of you milky water is a 4 legged friend, this has worked for me.