Oh. I thought you were leaving sooner. IF you do decide to use the tabs now, keep an eye on your pH. It is very acidic and will drive your pH down.

A couple other options instead of using the trichlor now:

1) Go ahead and add a little bit more stabilizer directly to get to around 45-50 and then use the tabs while you are on vacation. If you do this, you will want to leave a little wiggle room for the tabs to add some CYA while you are using them.

2) If you have any, use some dichlor now which will add CYA and chlorine. Again, if you do this, leave some room for the CYA to increase a little if you plan to use the tabs while you are gone.

Choices, choices.

One other thing, if you do use trichlor while you are gone, you'll want to raise your pH up to the upper 7s so that if it does drop while the tabs are being used, and it will, it won't go below 7.0.