What you've read -- From Where? Check the Star San site. I've measured my solutions a couple of months after mixing and the pH (The determining factor) was well within the Companies guide lines.
Certainly go with what you feel is best for you. BUT be sure of your sources.
The Manufacture's data sheet should be your guidance:
https://www.fivestarchemicals.com/wp-content/uploads/StarSanTech-HB2.pdf
Here's a post from someone on a home brew site:
FlyGuy
Calgary, Alberta
Posted Aug 11, 2008
Make it from de-mineralized water (reverse osmosis, distilled) and it will last for months and months. According to the manufacturer, as long as it is clear (not cloudy) and the solution is below a pH of 3.5, it is effective. According to these criteria, I have kept it stored for at least 6 months with no degradation.
Also, if you are sanitizing immaculately clean items, it can be reused over and over with very little degradation. I have a bottling bucket in which I mix up about 4 gals of Star San solution. The tap on the bottom of the bucket is good for dispensing (e.g., to a spray bottle) and the bucket is big enough to dunk most equipment. That stuff is pure magic!
I wouldn't recommend storing much in there (especially not vinyl tubing). Star San reacts with vinyl and nylon over time, and it will degrade the solution and cloud your tubing. It might also make nylon quite brittle. Having said this, some claim to do it with great success.