Well, i got the 15G up and running. now what to do with it. i was thinking of turning it in to a "exotic" tank. but im at a point where i dont know what to do. any thing would be helpful. the filter is a EHEIM AQUA BALL ment for a 26G tank min. it has a air stone and a heater too. i am thinking of going Brackish but im worryed that my filter wont handle it. thanks! this is for my 15G