just my opinion
Personally, I think an iodine dip like sea chem or TMCC should only be done for about 2-3 minutes maximum. Flatworms tend to come off right away in my experience and leaving the coral in longer creates a lot of stress. I use a one gallon bucket so I can shake the coral in the water to help the process along. An interceptor dip actually needs to be done for a minimum of 30-45 minutes and even then you may still have a few stragglers that hang on. If you find red bugs upon inspection use a QT and give it the full 3 week treatment.
For fish, I find shrimp, snails & mandarins seem to be need more acclimation than most others especially since some stores have their salinity very low so be mindful of that. I have seen the SG at one LFS in particular as low as 1.017 so I always test to see what needs to be done as my system is generally at 1.026 SG.
Also as mentioned some fish are more sensitive than others so my acclimation procedure will vary depending on the fish.
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Greg
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