Question
From this question we know that what swimming pool stores refer to as "liquid chlorine" (sold in 10 gallon jugs) is most likely sodium hypochlorite ($\ce{NaOCl}$). In the spirit of Least Publishable Units (LPUs) I'll ask a brief sequel separate from the first question.
The worst is when microorganisms (algae) overrun the pool. In the presence of summer heat, ample sunlight, and perhaps some nutrients (just phosphates?), the green population can multiply rapidly. Is calcium hypochlorite ($\ce{Ca(ClO)2}$) (sold in crystal form) as effective as sodium hypochlorite ($\ce{NaOCl}$) in sanitizing a swimming pool from algae?
Context
A certain talented fictional chemistry teacher whose fame rests on illicit activities apparently had little difficulty maintaining good water quality in his swimming pool. Yet anyone who has tried will attest that maintaining immaculate water clarity is sometimes a nontrivial objective.
This is the second in what may be a series of questions trying to understand the basics of maintaining a swimming pool. A quick search online will show an enormous number of results—all amateurish and none technical, hence the need for learned opinion.
