

The tank actually looks pretty good to me, but the water level could definitely be filled up quite a ways more.
Well it's good he doesn't change the sponges on the filter. Changing them can kill the fish by removing the beneficial bacteria that keeps the tank "cycled". That said, you should squeeze the sponges out in a bucket with tank water every few weeks to clean them.Yeah. He refuses to do water changes or change his sponges on his filter, but the fish have been alive for 5 years so