I have a 210 reef with high light and need to buy a chiller. A drop in type would be much more convenient as I would have to put the chiller about four feet off to the side off the tank due to space issues. Through a lot of searching I often read that drop in chillers are not as efficient as in line but it seems to be hear say. Is anyone using a drop in they are happy with or does anyone have any opinions on this issue? Thank you for your time.