Hi all, Currently i have a 3 G Marineland Eclipse. I have had this for nearly one year now. My one goldfish has steadily outgrown it. It really needs a bigger home and maybe one friend too. So i have decided that it's either a 20L or 29 G tank. I like the 20 L as it's low and long, but if there is a better reason to go 29 G then i'm all ears. the height is the only difference. also if in the future i am to decide to try a different fish in the tank, is there a benefit in having one size over the other (20l or 29)? but for now it's goldfish. i really can't get anything bigger for my place.