Do fish play??

[vanderkm]

We have gotten our first fish tank set up (75 gallons with three comet goldfish) and these guys seem to be nuts about the bubble wall and the filter outlet. They hang out by the filter outlet, get swept up in the stream of water, shoot across the tank and seem to keep coming back for more. They seem to do the same in the bubble wall. Its not that they don't have lots of room and sheltered areas in the tank to go to. I am wondering if they are needing fresher water (going to the cleanest part) or something else is wrong - or do they just like to play in the water. The water quality tests fine (ammonia, etc) and it is a big filter for fish that are just a couple inches long. Any ideas??

Thanks,


Mary v.