Never pour bleach into a swimming pool unless you are closing it for the winter. Usually the bleach will kill most things that try to grow in it during it's closed state, however, bleach will literally bleach a nice blue vinyl liner light-blue and eventually weaken the liner. The regular "chlorine" used in pools is NOT bleach, it's a chemical called "chloramide" which is more safe to use when humans are swimming in the pool.
No such word exists; chloramide. A minor part of the statement above may be true. Bleach - the household laundry product - 5% has 95 % inert ingredients. Swimming pool chlorine - 12% - nearly 100% pure chlorine. With that said -- what do you think is going to sanitize your pool better -- the low grade laundry product or the better quality product? Which of the two products will you have to use to do the job right? You are going to have to use 4 to 8 times more of the 5% product to achieve what the 12% product will. If used indescriminantly even the lesser grade 5% product will "bleach" out a liner as will the sun. I for one would not want to swim in the above person's pool at any time.
The statement, too, that the bleach will kill most things trying to grow in the water -- that is precisely why you add chlorine to a pool. I bet the statement, if read by the health department, would make them cringe and shudder.
If, by the word chloramide you mean chloramines then you are again making a false statement. Chloramines are contaminants combined with chlorine that give you that chlorine smell near the pool. This is a strong indication that you DO NOT --DO NOT have sufficient chlorine in the pool. You need to add more chlorine to oxidize those contaminents. That is also why they have test kits!
The above stating you would have to use 4 to 8 times more of the 5% product than the 12% product makes no sense. It's a little closer to 2.2 times. The laundry product is no different than the liquid chlorinator at a pool supply store it's just less concentrated. To refer to it as "the low grade laundry product" vs. "the better quality product" is misleading as it's the same sodium hypochlorite in both.