so the wife has these gold fish and 2 small koi in a stock tank. I wasn't really digging the seam on the tank for a long term residence for them. so scoured craigslist and offer up and fakebook and came up with these 2 tanks. the top one will be a bog filter eventually only fish in the bottom tub. going to build a back drop to block out my boat. have some vine crawl over it etc... had to move the last of my tomato's out to make room.