We have been struggling the last few years with our pool not being very clear. Also we were having trouble with low water pressure. The jets did not have the pressure that they used to have. We have a cleaner that rolls across the bottom of the pool and vacuums it. It has not worked the last couple years. Today my son Jordan came over and helped us to change the sand in our filter. The pressure has improved dramatically. We should have changed the sand a couple years ago. It has been about seven years since we changed the sand. If you are having problems with low pressure this might be the fix that you need. Cost- $80.