I currently have a 50 gallon reef tank set up, pretty good equipment, no controller. I am mainly doing SPS and plan to do a 10-15 gallon weekly waterchange. I am using Red Sea Blue bucket salt...like the starting parameters. Good water flow, good light, good skimmer, etc... I currently don't have a controller. Have been thinking about it, but have not done anything. If they were free I would probably get the Neptune fancy system. However, for $90 you can get the ReefKeeper light. I kind of like it just for the temperature if nothing else. What do you think? Worth the $90?