Carl's definitely got you going in the right direction!

Let me add a couple of further notes:

1. Take back ALL the chemicals you can. Breakout 35 is overpriced underpowered granular chlorine sold because dealers make more selling it as a 'quick-dissolve' chlorine, than they do selling bleach as 'instant-dissolve' chlorine!

2. You mentioned 12# of "granular". What KIND of "granular"? As Carl noted, your CYA is already too high, and if it's "granular dichlor", it's making an existing problem worse.

3. Use an OTO kit ASAP. If your dealer is using DPD (pink / red) color match testing, your ACTUAL chlorine may be very high.

4. Post your exact filter make / model. A dealer that would sell you lithium (Breakout 35) would sell you crummy Pleatco cartridges. You may have to replace it, and use it only as a back-up.

5. I'm going to contradict Carl on this one: don't remove the tablets. The amount of tablets in the feeder aren't going to make a big difference. There's hardly anything safe you can do with wet trichlor, and there's no way to dispose of them short of giving them to a friend with a pool. Do NOT put them in the trash; you can start fires that way! If you DO remove them, do so on a sunny day, and carefully dry them on your pool deck, before storing them. Put down a piece of Saran to keep them from damaging your deck (they are quite acidic).

But, as Carl implied, DO return any tablets you can. Unless you drain your pool or have a major leak, you're not going to need more till next season . . . and they don't store well.

By the way, when we say take everything back, we mean ALL chemicals you bought from that source, that they will take back. It's a pain for us AND you to parse through a half-dozen chemical labels trying to figure out what won't mess things up further. We ALREADY know your dealer will sell you stuff you don't need . . . and won't want, once you know more!