The more chlorine in your pool, the faster it'll burn up. Adding all the liquid chlorine that you would normally use in 11 days will not last 11 days. The CYA is protecting a certain amount. Above that amount will just vanish quickly. So without automation, you only have three choices: tabs or favors or a service.
If you really have no neighbors or friends or family to dose the pool daily, then tabs it is. CYA will be what it'll be when you get back.
But if you can coerce someone to help, you can make their job as easy as possible. You must know by now what chlorine your pool typically consumes a day. Prepare that amount in 11 containers (like plastic jugs, empty soda bottles, etc). Then all your helper has to do is show up at about the same time each day (when your pump is scheduled to be running) and dump in one container. They won't have to test. They won't have to measure. Just a quick visit.
I know I would do that for a neighbor, especially one that has a pool that might let me use it once in a while.
For next time, consider fostering relationships that could cover for you. Or start looking at automation. My pool will easily go 11 days without me. And I have a pool cam, and a separate pad cam, that I can view while away from home, just to be sure everything is running OK.
And of course, you can always pay someone to be your friend! A local pool maintenance service could come once a day to cover for you. That has the advantage of engaging a service that could step in to repair something that goes wrong while you're away: which Murphy's law dictates is the only time it'll happen!
Point being, without someone visiting your pool daily to keep an eye on it, there's a lot more that can go wrong than just an algae outbreak. I doubt a pool can last 11 days in Texas without being topped off with water, so I assume you have some sort of auto-fill system. Do you have a plan should that system fail on day two of your time away? My auto-leveler system, for example, decided to act up a few days before I left for a long weekend last week. It was overfilling the pool (dang Murphy)! I was able to check the pool level a couple times a day, via cam. In addition to FC and pH automation systems, I have a motorized valve on my auto-fill supply line that would allow me to shut it down while away should my auto-filler get stuck in the open position.
If you have no one to help you, automation can save the day. And you should have a pool maintenance company standing by, willing to handle emergencies, and a pool cam that you can trust to let you know if and when you have one. You could have a pool cam from Amazon up and running in two days, if you wanted to...
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