How does this work?

[Cory]

So this system is apparently self sufficient. I understand that the shrimp would eat the algae, and the algae provide the oxygen. A little cycle.

But what about alkalinty? Does it also remain the same? Its completely sealed.

 

[JimWelsh]

@Cory please suggest a hypothesis wherein alkalinity would change.

 

[Randy Holmes-Farley Verified Community Expert]

If nitrate is stable and there are no calcifying organisms, I think it will remain mostly unchanged.