Liquid water softener :H
That stuff is for use in washing machine..cleaning clothes NOT for fresh water tank.........
Get a portable RV softener.........connects to spigot. Output is then used to fill fresh water tank or connect directly up to city water connection
We have an 'On-The-GO' Brand....use it all the time when in S/W (AZ, TX, NM, UT) etc. where water source is HARD.
Minimizes scaling/deposits on faucets, in water heater, shower etc. OK to drink but like any 'water softener' can add some sodium to water
Other Brands of softeners available
FlowPur
Waterstick