Question
I have some spider plants that I keep indoors and are hanging from the ceiling in front of windows.  I only water once or twice a week.  The leaves are turning brown running down the middle of the leaves.  These are seemingly healthy leaves and not ones that are dieing off.

Answer
Dena:
These symptoms may be related to root/soil stress.  Soil should be moist, not too wet or dry. If it has been in the hanging basket for awhile, take a look at the roots to be sure they have not filled up the room in the pot.  If so, it may need to be stepped up to larger pot.
Regards
Steve