Seashell - you know your stuff. Yes, I have done extensive research on the Blue Hole and the fun begins below 130' which I've done in the Maldives when my dive team were doing their advanced dive course and they allowed me to go with them. I understand the descent must be fast and bottom time wold only be 10-15mins due to depth and slow ascend with stops in between to release nitrogen. I am pretty excited and anxious at the same time as I have read in many of the books I've done research in that this is a technical dive and not for everyone - let alone having a divemaster chum sharks - I don't very much like that idea.

Thanks so much for your advice and I will continue to read some more - I can't wait to meet all the wonderful underwater creatures and see the beautiful colors of the reefs.

Thanks again!
:p