tropical fish are a rather inexpensive pet though the starting is a bit priceythe basic price [canadian] is about 15$ heater or 30$ for a good one 10-20$for a good 10 gallon glass aquarium 30-40$for a good filter i reccomend an aquaclear 150=10gallons 10-30$ for an air pump 10-15$for gravol for the bottom of the aquarium [rinsed] 5$flake food [for most tropical fish 2-20$plants and ordaments 2$thermometer How to set up your aquarium : place the aquarium in a place where it will not get too much direct light on a nice sturdy table. next put the rinsed gravol in the aquarium and set up the ordanments,filterand air pump according to manufactuer's directions. Now add water and start filter heater and air pump. Let the aquarium sit out over the next few weeks for the chemical's in the water to diapate and to le the benificial bacteria do it's job. make sure your aquarium light is not on too long or the aquarium will develop an algae problem. After a month it should be fine to add fish and check with your petstore for the types of fish you should keep and the tempatures and foods. note:this section is NOT finished