Hey peeps.
So removed UGF ( What allot of poop i found there ) and replaced fravel with sand ( Added ferts on bottom of tank. )
Now very silly question. The poop that goes and lie on the sand?Does it rot and go away or how does it work? I Have 700 liters filtering running at min to counter the water movement so its about 350 liter filterig per hour.
I have 60 liter tank.

So removed UGF ( What allot of poop i found there ) and replaced fravel with sand ( Added ferts on bottom of tank. )
Now very silly question. The poop that goes and lie on the sand?Does it rot and go away or how does it work? I Have 700 liters filtering running at min to counter the water movement so its about 350 liter filterig per hour.
I have 60 liter tank.