Over the last couple of months the sphagnum appears to have "settled" 
and now is about 1/2 to 3/4 of and inch below the rim of the pot. The top 
of the sphagnum remains green in spots, and in other spots it remains a 
slightly brownish-white color, but does not appear dead. Should I be 
concerned with this settling and that some spots on the surface do not 
grow green?
  Another concern is of water depth. My pot is 5.5" deep, and sits in a 
water tray about 1.5" deep. Is this depth of water sufficient for the 
proper growth of live sphagnum?
  I would like to eventually move to a larger pot. Can I rely on the 
sphagnum I have to grow to fill a larger pot or am I going to have to buy 
some more?
  Any help you can provide would be greatly appreciated. Thanks.