In reefing, too much is never enough IMHO. I have a refugium on my 300 gallon pond, and it's 60 gallons (all of it is rubbermaid tubs, check out my website to see it). I have a DSB in it, mangroves, and macroalgaes. Pods grow like crazy in it, but then again, they also grow like crazy in my main pond as well (the seahorses have constant food supplies everywhere).