This week my aquarium did not seem to have as much life has it had in the past. A lot of the smaller organisms were no where to be found, and the larger ones had started to disappear. The seed shrimp seemed to still be doing just fine. There were still a lot of them and they all looked healthy. There is not as much mud at the bottom. I figure it was from all the organisms eating it, but with there being fewer organisms, I don't know why this happened.