I have posted this advice before. I will assume that the chlorine bleach flushing has been completed and the tank and system have been flushed with fresh potable water. Refill the tank using a mixture of Apple Cider Vinegar
and fresh water in the same concentration that you used when sanitizing with bleach. Permit this mixture to be passed through the system and sit in the tank, preferably overnight. Then drain and flush the tank & system a few times. At best there may be a slight smell/taste of Apple Cider Vinegar which is one heck of a lot better than Bleach. It will dissipate over a short period of time. Why does this work?...... Chlorine Bleach is an Alkali and Vinegar is an Acid. Therefore, the acidic Vinegar neutralizes the alkali Bleach. The Chlorine available in most municipal water supplies will be enough to keep the water safe. I have used this method for many years since first learning about it and can testify that it does work. There is no reason that you could use ordinary Vinegar but any residual taste is much more pleasant and anyway it's one heck of a lot cheaper than Vodka!!!