I have a 10 gallon tank that I started about 6 months ago, 6 neon tetras, 1 oto, 3 amano and 2 cherry shrimp. I just have a few anubias and java ferns in it at the moment. It was doing well but I decided to switch the substrate from gravel to sand about 3 weeks ago. I now have a diatom explosion and my oto appears to be on strike so the tank glass is filthy, he keeps the plants clean though. How long is should this take to die down and is there anything I can do to help it along?