Philip thank you, lots of useful info for me to mull over. I did look and my current fertilizer does have urea so I'll deffinately have to switch if I want to be more eclectic in my collection . I have to repot my phals tomorrow before it gets too hot so I'll try to take some pics of them then for further analysis.
Just want to say that I have learned more from this forum in the last week than I have in a LONG LONG time you guys all rock!