What microbes are lurking in your fish tank? Good candidate for some citizen microbiology I think

Recently I wrote here about a new report on a citizen microbiology effort focusing on microbes in water heaters: More on citizen microbiology project from @Penn_State & @NASA on thermophiles in water heaters via @scicheer @Sci4Cits Well, a new paper in PLoS One (PLoS ONE: Aquarium Nitrification Revisited: Thaumarchaeota Are the Dominant Ammonia Oxidizers in Freshwater …