Salts or minerals in the water or soil can be the cause of healthy leaves on indoor plants to tip and turn yellow and eventually brown.
Using treated water and making sure that most of the fertilizer from the nursery is leached out of the soil will help. Fill your water buckets and let them stand for 24 to 48 hours before watering your plants. Better yet, catch some rainwater and use it for your indoor house plants.
We see this mostly on the leaves of plants in the Draceana family such as Massageanas, Marginatas, Tarzans, Arboreas, Lisas and Janet Craigs as well as on the leaves of the Spathiphyllum( Peace Lilly). Triming the discolored portion of the leave with a clean razor or scissors is the norm but know that once tipping has occurred it will continue.
As long as there is new vibrant growth on the plant all is well.
If the brown tipping is out of control contact your interior plant specialist at Botanic Effects.