90G=6 silver dollars, 2 are 6 yrs old &4 are 4yrs!,2 4 yrs pictus catfish &4yrsWhodini, american freshwater Eel (natural river pebble 4 substrate)
60gal=4yrswhodini's twin eel Zippy, gimpy GF(white Quatz gravel)
45 octagon =Kaily a 18 yrs old calico goldfish(3mm gavel)
20gal planted w/ 1yrs...