I am so lost as to what sanitizer to use. I was using trichlor tabs and all the Facebook and internet forums said to stop using them because it'll raise your CYA to the point you'll need to drain the pool. So I switched to cal-hypo tabs and now I'm told I don't want to use this because your calcium will go through the roof and you'll need to drain your pool.
It’s true that unfettered use of trichlor & dichlor will raise your cya quickly & they are also acidic.
& the same applies to cal hypo with regard to calcium buildup.
So those are not recommended for daily chlorination. Save them for vacation when you can’t be there to dose.
Instead we recommend liquid chlorine or a salt water chlorine generator for daily chlorination.
Before chlorinating your pool, you should know these simple tips. Learn the best way to add chlorine to your pool.
www.google.com
So then I say I'm just going to use liquid and I'm told that first my pool is too big to effectively use liquid and second, liquid will destroy my vinyl liner.
This part about damage is not true if used properly. Pour liquid chlorine in slowly infront of a running return & brush the area.
All manually added forms of chlorine can damage your liner if they are allowed to rest on it.
Yes, your pool is large- it will require larger amounts of any form of chlorine.
Liquid chlorine is still the cheapest form of manually added chlorine available in most places especially if you seek out the best price.
So someone please tell me what the heck am I supposed to use. I don't know enough about salt, but I'm told I'd still need to use some form of chlorine.
My pool is crystal clear and up until yesterday my numbers were
FC 4.6
CC .2
PH 7.4
ALK 90
CH 100
CYA 35
My FC is a little higher right now since I bought the floater, but everything else is still good.
Your fc of 7ppm is not high it’s right where you want it.
Your cya counts as 40 for chlorination purposes (always round up if between two values).
FC/CYA Levels

Either sell the cal hypo tabs or get a proper feeder for them if you wish to continue with them.
Use
PoolMath effects of adding to see what each dissolved tab (cal hypo or trichlor) will do to your water. Most are around 8oz.
This applies to all chems- blind use of any chemical isn’t recommended. Use effects of adding before hand so you know what each thing will do & whether you need it to do those things or not.
Btw- when testing fc & cc you can use a 10ml sample, one heaping scoop of dpd powder and each drop counts as .5 ppm. This will save your reagents & is plenty accurate enough.