I will try to post some pics later, when i figure out how to post pictures haha it is a fully cycled tank, about 3months old, i use to keep a gator gar in it, until the gar got a little to big and needed to be transfered to a pond. i am very sure my water does not contain chlorine. i do 10% to 20% water change weekly. i have a wet/dry overhead sump(diy) for filtration and a sponge filter i just keep in there so that i have a spare cycled filter for emergencies.