Now and then, we doddering old geezers get invited to go back to school. Actually, this was a preschool for kids just learning how to read. Much to my relief, the kids were not there, but a dirty 30 aquarium was. It started with a turtle, two mollies and two goldfish. The turtle had been moved, but the fish all had quite a bit of missing finage. The water was cold with a small amount of ammonia and a large amount of nitrite. It had not been cycled, so I replaced a bucket or two of water and donated a large gob of hornwort. The aquarium is supposed to get another water change before the week end, and one mollie is going back home. If none of that works, I'll probably get expelled from preschool. Oh well, I hated kindergarten anyhow.