Do you add algecide after shocking a pool?

Yes. We had a problem with algae one year. The chemical that kills the algae will eat up your chlorine until everything in the pool is dead. When you add the algaecide, you should add chlorine at the same time, imediately after. Your filter should be running 24 hours/day until the algae is clear. Everynight after the initial treatment, check your chlorine levels with an at-home test. They will likely be low. Add liquid chlorine if the levels are low. (You are not going to kill your liner since the levels are already low.) This aids in the algae killing process. You should only have to do this for a few nights. After the third or fourth night, if the algae seems to have cleared up, but the chlorine is still low, you may need to add stablizer, along with one more dose of liquid chlorine. It would be good to take a water sample to a pool chemical dealer after the algae appears cleared. The amount of liquid chlorine you add each night depends on the size of your pool and how low the chlorine levels.