Thanks guys,
I was beginning to get depressed. I have a 72"x18"x20" tank, DSB 4-5", 25kg LR, various frags, 1 yellow, 1 blue tang, 2 oscellaris clowns, 1 cleaner wrasse, 1 abalone, 1 CBShrimp, a couple of snails, a couple of hairy crabs and a wily mantis shrimp :x My sump is my main concern...