Being new to the orchid world I am not sure if this is a natural occurrence. My phals have been doing terrific with blooms lasting up to 3 months or so. The other day I noticed a spike had turned a deep red to brown color and the blooms are all dying. The other spike is fine with beautiful blooms. Not sure if I did something wrong or what I should be doing.I love these plants and would like to keep them healthy. Help