I was unable to bring up your answer on purging the water tank. My problem is that I have a Plastic (15Gal) fresh water tank. I have been using aqua tabs from West Marine and tried Sweet Water which is to remove the plastic or rubber taste from tanks. This did not work. Also there is no chlorine listed on the label of the Aqua tabs. Several questions: Is there anything that works to improve the taste? How long do the Aqua tabs keep the water safe to drink? Should I be looking for another product and where can I get it? First time in this forum. Look forward to your reply.