The cartridge acts as the lid so I would need a way to close out that port so as not to have water leaking everywhere.

We opened the pool Tuesday....I came home from work to see the duoclear wasnt even working....I think the motherboard is shot.....replaced it last August (under warranty).

I'm definitely convinced switching is the best thing to do....only question is which unit...cant believe thee havent been more replies.

One "biased" plug for autopilot above and Ive read a bunch about the aquarite but thats it.

Keep the responses coming.

Thanks in advance--
Tony