I am wondering if a water change is really necessary if you have a heavy planted tank with a light bio load.
So the nitrogen cycle: Ammonia>Nitrite>Nitrates(which is absorbed by the plants as food)
I use to have this sealed shrimp ecosystem which was like pyramid with some shrimp, some plant and it was completely sealed.
You never changed the water, never feed the shrimp and it would keep running. The shrimp waste broken down by the nitrogen cycle acted as fertilizer for the plant which I guess the shrimp ate or maybe algae on the plant.
Anyway, this was very small. Probably a fraction of a gallon but it lasted for a long time until I accidentally exposed it to direct sunlight which killed the shrimp.
Anyway, why can't a planted tank be kind of like this?
Setup an office with a powerful LED light on a timer, maybe some kind of auto fill water system, TONS of plants and some shrimp and maybe some small things which can feed off algae and plants and let nature run its course with little to no maintenance?
What do you think?