ATip For Your Water Tank

I often read comments from those with water tanks complaining of taste issues and 'floaties' in the water.
I have a 60 Lt stainless tank in the Troopy and every 12 months in November I clean it out using a high concentration of "Nappysan" or its cheaper Aldi equivent.
It works a treat and an easy solution to a perennial problem. Normally mix about 2/3 cups of nappysan to 4 lt of warm water(not an exact science) I then poor the mix into the water tank which may already have 30/40 Lt of water already in it .I then run the water throught the lines and leave it for a day or two(again not an exact science) until it then suits you to empty the tank, then flush out the tank and refill with clean water. I then add a water purified to reduce the chance of algea growth.I use a product from 'Whitworths' the discount boat supplier called Starbrite Water Conditioner. This works really well for me, never any problems from tainted water.
I'm sure there are other methods What do you do to combat this problem??

Jeff