+1 I have tried many different concentrations with no ill side affects. I honestly stop measuring in ml and just shake/pour till I get a nice milky mixture in however much water I have in my bucket. I have left acros and acans in the dip for up to an hour before, due to getting side tracked and forgetting I'm even dipping, with no issues. Though, smooth skin acros seem to be sensitive to the dip so I make sure I only dip those for 10-15 min max and sometimes at a more controlled concentration. As for your monti if it's deteriorating I would go easy on the concentration to ensure no extra added stress to the coral. I would think 10ml per one cup of sw would do the trick.