The first few months go ahead and budget a couple of hundred dollars.. things like, oop's I need a skimmer, and oops I cant see the rocks becuase of the algae will cost you alot of money.. and if your starting with 10 small fish already and you didnt let the tank cycle for a while.. well.. go ahead and budget 10 more fish.. But I think my tank's use about $20 a month in electricity.. I didnt notice a huge spike when I set either of them up.. and for food.. maybe $5 a month.. if you feed brine..