When Abby and Buck use the hose to pull the child from the electrified pool, the hose switches from being cut from the hose reel to attached to the hose reel between shots.
At the beginning of the episode, after the floor collapsed, Bobby confronted the owner about the out of code use of kal-pal, it was actually called pal-kal. Pal-Kal is a cheap, lightweight construction method that uses metal plates and thin layers of cement.
When the power line falls into the pool, Buck stops the father saying that 5000 volts are being discharged into the water. This is false because the power line has two insulator disks meaning that this power line is transmitting between 14,4000 and 23,000 volts.