Is my cell dying?

[JimK]

Thanks you. I greatly appreciate the suggestions.

When I closed the pool last fall the cell did have some calcium deposits so I did a manual cleaning per manufacture's instructions (sprayed with hose nozel and scraped off with wooden toothpicks). The manufacture only recommends acid washing in severe cases (I didn't think it was anywhere near severe). Btw, since the cell was installed in 2008, this is the first time it had any scaling. There's a thread about that here;

http://www.poolforum.com/pf2/showthr...-on-cell...why

As mentioned in my original post, I increased the SWCG to 60%, there was still a loss, but only .5ppm this time. Just to make sure the cell was generating CL, I ran it at 100% for 10 hours which resulted in an increase of 2 ppm.

So the cell is generating CL. At this point I'm thinking that the cell is OK but the colder than normal water temps (it's been in the low 70s) and perhaps the cell's age mean I just have to run it at a higher setting than I'm use to for now. This morning I set it to 65% and will see if it stabilizes. If I can't get it to stabilize, I'll try an acid wash.

I'll update again later.

PS - Any idea if the cell I linked to in my original post is the same as mine? I'm thinking it is, but am not sure. I thought about a "generic" cell, but I've read a few posts where there were problems with correct salt readings, so I think I'll stick with an OEM cell.

PPS - I just discovered that my Aqua Rite is running software version 1.5, so is compatible with the newer T-3 and T-9 cells. I thought this was strange since it was installed in 2004 (the newer version didn't come out until 2009), but looking at my notes I was reminded that the main board had to be replaced in 2009, hence the updated version. Interesting, but I'll stick with the T-15 cell as it should last longer.