Hi i have a 6 ft x 18 x 18 tank and have nothing in it, i need some ideas on what to put in there i want something unusual but dont want the tank looking bare so would like a few fish in but ones that i will be able to keep for a good while as i dont want them to outgrow the tank withing 6 months i have no decor at all and i want to know what i could do for that maybe some pics would help? i dont want plants as iv had bad experience with those, i really need your help guys i need to know where im at so i can get this started by the weekend?