plants only tank- do I need a filter?
I have a plants only tank, recently planted.
I run a sponge filter in it currently.
The noise from the air bubble is annoying me (I like silent when I work), so I started thinking, do I need this filter at all if I have no animals in the tank (I don't have snails as well).
Doesn't the air from the filter just take the little co2 away from the plants?
So basically I have two questions:
1- do I need the filter now at all?
2-In a couple of months after the aquarium is old, lets say I only add a few shrimp and a few nano fish to a 50 gallon planted tank, can I run the filter 1 hour on and 2 hours off during the day, then keep it on all night? or would that be problematic? (If I make any changes like replanting I would run 247)