2 clowns, diamond goby, and 2 blennies. the current filtration on this is a cannister, which i change the water from weekly most times, or at the most, bi weekly. once i build a new stand, and complete my sump, i will be running a skimmer/sump setupWhat exactly are the 5 fish in this tank? Is it an AIO? Sump? If not, is there any type of filtration on this tank. IMO the first piece of equipment you need to purchase is an ATO.