My pool was installed at the end of last season and running for about a month using BBB method and some pucks. This year it still had some of the pucks in the feeder from last season and they don't seem to be dissolving at the rate I think they should (in my very limited experience). The feeder is turned up to 5 which is the max. I am using the pucks to get my CYA up to 25-30. It was less than 20 using the K2006 test kit. How can I tell if the chlorinator is clogged and is this a common problem?