Im deciding on whether or not I want to set up a refugium. Really the decision is on how I want to set it up. I love the mandarian Goby (who doesn't) and feel like the best way to keep one is with a fuge. I had one for 2 years previously, but had to move and tear down the tank and sold him. I have since restarted the tank, but this was after the tank and rock set dry for 4 years so my copious amounts of pods are gone. I didn't have a fuge before but had tons of rock and I was worried he'd eat them out quickly, but they kept up with his diet and he was thriving. This time around I don't want to wait years for the pod population to be that strong in the tank before I add him. Previously you couldn't look at the tank without seeing them crawling on the rocks, sand, and glass. SOO I've decided to add a fuge this time around. The options are a HOB fuge or a separate 5-10 gallon tank. I don't want to swap out my whole sump really cause I think it would be too expensive to do it. I haven't totally ruled that option out, so if you think its possible feel free to show me some cheaper options. I am leaning toward the separate tank and using the outlet line of my carbon reactor as the inline for the fuge and just adding the same pump with an inline control valve as the return line to either the display directly or back to the sump. I would need to figure out a light option for this setup as well. Let me know what you all think would be the best route to go, as well as a good affordable light option for the fuge. My display is 75g.