When I set up my 300g reef, I was fully prepared for the upfront equipment and other startup costs. However, I never figured the recurring monthly maintenance costs would be anywhere close to what they've become (electricity, food, salt, water, test kits, lamp replacements, clean up crew replenishment, RO filter replacements, supplements, replacing broken equipment, and the list goes on and on). What I had anticipated to be somewhere in the ballpark of $100 or so quickly became $400 or more!!! :scared: