Thanks folks,

the system I have is the one with the cartridge that needs to be replaced each year (although I decided to reuse last year's cartridge this year because we opened the pool just in July).
rcy100: how long do you expect the electrodes to last?

I've been trying to find a good source for Taylor kit in Canada. The prices seem to be much higher than in the US but I haven't found a seller shipping to Canada yet.

Thanks again for the suggestions, I'm seriously consider getting a membership on this forum.

Cheers