thanks AK, the back left one has been a trouble child from the beginning. same strain as 2 of the 3 others (blue dream) with the same feeding but is much shorter and some of the fan leaves have a brown stain mark. I was thinking it needed more cal/mag (using distilled water) but the other 3 have no problem..so i was thinking about just letting it go on the same feeding schedule as the others and see what happens..thanks for the reply!