Bily have a cup of tea on me that was a very well wrote peice *applause*.
Graeme, in this hobby its nearly always more expensive fixing something that went wrong because you went steaming ahead

.
Rikki
Ps. Some things to ask at a LFS to figure out if they are as knowledgeable as you want them to be...
Will a Tang thrive in my Nano? (The answer should be a resounding NO, with comments about a blatent lack space being made)
Can I put an Anemone into my nano strait afterthe cycle has ended? (Again your looking for a NO) ((I in no way advocate any one to keep Nems with limited experiance and in the such small confines of a nano, adversly i dont say it cant be done either for those experianced enough to attempt it!))
Can i keep SPS (Small Polyp Stony) Corals in my nano under stock lighting? (As with the other two questions your looking for a NO, with something to do with insufficient lighting being the hindering factor)
Aslo check their display tanks thoroughly, filthy? distressed,listless, sick fish? corals looking less than healthy? All "can" be signs of a poor LFS