Algae-Bacteria Consortium

If you are a Fishkeeper, you are probably well aware of the Nitrogen Cycle and the common bacteria that transform ammonia to nitrate (the most common of these is called Nitrosomonas). Later, other bacteria turn the nitrate to nitrite (most famously Nitrobacter). But these are not the only ones: There are more sophisticated bacteria that can directly convert harmful ammonia into harmless nitrogen gas.

Moreover, there are symbiotic combination of micro algae and advanced bacteria that can do this work even better, reducing all excess of nutrient to in an environment and bringing it to a perfect balance  (this is technically called algae–bacteria consortium)