Swimming pools blog

Have had to replace a vinyl liner after 10 years and it was pretty
faded. QUESTION- will using di-chlor granular INSTEAD of regular
shock you buy at Wal-Mart be as good or better and easier or not on
the liner?? Also, I usually have to shock once every 6 or 7 days.
Is this normal and would using the di-chlor help in thos area as well?
Finally, if I use Di-chlor is this OK to use with Tri-chlor tablets?
Thanks. Dale