I have a 21x43 oval vinyl pool that is 24,000 gallons. My water is well water and it is clean and clear... except that it is extremely hard 
When I filled my pool last year the water was perfect until I went on vacay and the ph went up high, and the floor of my pool built up scale from the hard water. After that I balanced the water again but some scaling remains. I used several expensive bottles of stuff form Leslies pools and it did nothing. I read that you could lower your ph for a week and brush it several times a day. It did help a bit but not much. I just bumped the ph back to where it is supposed to be. I wondered if it was possible to take a sand filter, remove the sand, and replace it with water softener pellets and run it between my cartridge filter and the returns? Would that work just like in a house?
When I filled my pool last year the water was perfect until I went on vacay and the ph went up high, and the floor of my pool built up scale from the hard water. After that I balanced the water again but some scaling remains. I used several expensive bottles of stuff form Leslies pools and it did nothing. I read that you could lower your ph for a week and brush it several times a day. It did help a bit but not much. I just bumped the ph back to where it is supposed to be. I wondered if it was possible to take a sand filter, remove the sand, and replace it with water softener pellets and run it between my cartridge filter and the returns? Would that work just like in a house?