Yes — and it is probably less expensive than you might think. Many people know that water softener systems and water filtration systems exist for homes and houses, but some do not know about shower head water filters. Shower head water filters, much like the name implies, simply replaces your shower’s existing head with a new one that can work to soften your water, remove harsh chemicals like chlorine, or all of the above. Websites such as Amazon offer comparison shopping of shower water filters (compare shower head filters) — most of which will cost you less than $100.
If you are looking for an economical solution to a hard water problem, outside of the shower, that is, there are also portable water softeners available, which are slightly more expensive than a shower head water filter, but nonetheless something that will help you to soften your apartment’s water.
If you are looking to soften your drinking water, or at least make it safer, or easier, to drink — water filter pitchers are an inexpensive option for apartment dwellers.