Originally Posted by
1journeyman
http:///forum/post/2518940
In a fully cucled tank you should have readings of:
Ammonia 0.0
pH 8.4 (measure at multiple times in the day, morning and evening. fluctuating pH can be an issue at night and early morning)
Nitrite 0.0
Nitrate> 0.0
In a tank with a refugium to extract Nitrates, or with a deep sand bed you can conceivably also keep Nitrates near 0.0. Otherwise they will slowly climb and water changes will need to be used to control them.
I understand trying for zero but isn’t ammonium less then .25ppm and nitrates less then .25ppm a more realistic goal?