The daily rearrangement of the environment makes the fish more interesting/interested. Some say goldfish don't care about plants in the tank. Ridiculous. All fish relate very strongly to the landscape and plants. Observation or Anyone who has sportfished with a fish finder can tell you that. Fish follow the landscape features, they don't float around aimlessly in open water. Exploring the new layout keeps 'em occupied and behaving differently all the time. it's still not much to look at, but i am still new at it.