You can leave the tabs in the skimmer and just pour the bleach in front of a return jet. Those tabs are acidic so you should not turn your pump off for more than 8 hours with them in the skimmer. Plus, you need to keep an eye on your pH since the acidic tabs drive pH downward. Once you know your CYA level, we can help you make a decision about whether or not to keep using the tabs or not as they also, like the dichlor, have CYA in them.