Update, the clowns have skipped a scheduled egg laying. Only a couple of reasons I can think may have caused this, one the anemone they where nesting in decided to go on a little expedition, two I had a slight nitrate spike and it took me two weeks to get it back under control (not sure this would have effected it but I was working in the tank a lot) or three me pulling the eggs last time upset them.
But on a good note, I have plenty of rotifers and green-water and the clowns are looking like they are getting ready again, just a little late. So hopefully this will be the one....