Large water changes input

[Parker]

Originally Posted by sirruckus

this is a 90 gallon tank

the problem with 10% water changes, it would take 22 consecutive days to get Nitrates from 160 down to 16 (theoretically) provided nothing else impacts the levels

That's assuming your nitrates don't continue to climb / increase along the way via heavy feeding etc.

The first course of action would be to find out what's causing your high nitrates and then come up with a solution and path forward. You don't necessarily want to drop your nitrates that far that fast, nothing good happens fast.