Portable RV softeners require manual "regeneration," which is just a fancy word for flushing. Here's a video that shows the process:
How often depends on the size (area) of you pool, rate of evaporation, the CH of your fill water and the size of the unit. For water with a CH of 257, (15 grains), the manufacturer claims a capacity of about just over 1,000 gallons for the
Portable Double Standard model. The larger
Park Model would provide nearly double the capacity. Having similar CH content and climate,
@mknauss can give you idea of how often he needs to flush his Portable Double model.
The unit utilize standard hose connection for plumbing. You would need to find a place in the fill line to place the unit.
Here is my install...back up in the thread to read more:
Any do's/don'ts for plumbing rv water softener in water fill line? I want it easy to remove as I think they all require manual regeneration.
www.troublefreepool.com
@kul installed a unit recently and may share his/her experience.
If you have a sewer cleanout near the fill line, you could install a conventional softener that perform automatic regeneration. When the regen process occurs, the effluent needs to run into the sewer cleanout. I'm on a septic system so this was not an option for me. This unit was recommended on the forum recently.
Hate to keep beating the same drum, but I would do all I could to get your fill line plumbed to your softener. You'll need to decide what's best for you and your husband in the long run.
We're here to help if you decide to go with the portable solution.