I opened the filter and pulled out the cartridge and it weighs nothing, so I am assuming its empty and needs replaced??
We are renting this house and I am wondering how necessary is this piece of equipment? We are heading to the pool store tomorrow morning to get the water tested and I'd like to have some knowledge before I go in there so they don't try to sell me everything under the sun.
The pool is looking great and I am so excited to get the water tested.