How often do yall sanitize your fresh water tank?

I full time so I bleach out the fresh tank OFTEN. When ever I get the chance I run a tank thru with bleach.

In my travels that tank sees a lot of different CG's and way too many questionable and high sulfur and/iron CG well waters! That and a sealed plastic tank and high ambient outside temperatures? Well IMHO it's the perfect petri dish for bacteria. I squash them with bleach.

I do NOT drink from the fresh tank or use it to prepare foods or coffee.