Water treatment works as a chain, and the chain is only as good as its weakest link. Sediment chews up softener resin. Acidic water attacks copper pipe and everything brass. Hardness scales up water heaters and fixtures. Fix one and skip the others, and the untreated problem keeps damaging the equipment you just paid to replace.
That is why we test before we quote. Hardness, pH, and a look at what the well is actually sending into the house tell us what belongs first in line, what size each tank should be, and whether a home needs one system or all three. This job needed all three, and now each one is doing its job instead of covering for the others.