Fresh Water Tank cleaning

Coming from the other side of the fence and maybe not knowing better (and yes we use our tank for drinking as well) I went 5 years before cleaning/sanitizing our tank with a bit of bleach because at a pod rally we attended an individual chewed my out for not doing this on a regular basis.  After doing this I had to do the lemon juice and white vinegar mix to rid the tank of the funky bleach smell/taste residue.  Since then I did do it again after 2 more years, just to satisfy my curiosity before going thru the process I opened up my screens on the faucet ends but could not find anything at all like you posted, in fact I found nothing at all.  Maybe we just have fine, pure well water, or maybe our systems are used to the little microscopic fellas that are unseen in our water.  So to date, yes we have cleaned our 2011 pod twice since taking ownership of it in March 2011.