How to sanitize RV water tank

Question

What portion of bleach to water?

Answer 1

Bleach is not good for your tanks regardless of what you heard. There are very small bacterias in your tank that actually decompose the waste. Bleach will kill these bacteria. These bacteria are your friends. Use a shot glass of dawn dish soap to 10 gallons of water and a bag of ice, This is all you will need, dump it down your toilet n take a short drive maybe 30 mins. The ice water and dawn soap mixture is not abrasive enough to damage your sensors but its abrasive enough to clean them. Use a scented soap to give it a decent smell. The ice and soapy water will slosh around while driving, when you're done dump the tanks and you will have a sanitized black tank. Your grey tank shouldnt have debris in it but if it does take a sewer connection with a flush assembly, dump the tank as best as you can. Hook up a water hose and let it run and flush the tank out. Hope this helps  

Answer 2

for a fresh water tank use  100 to 1   ===     100 gal water 1 gallon bleach  let stand 1 hr flush well

for a black water tank flush with fresh water only.