My concern is with phos and nitrates. I’ve been feeding twice a day seaweed strip in the morning and evenings with a mix of coral frenzy ,misis shrimp ,ad+ and a clam every 3-4days. In a 40 gallon tank. My phos and nitrates are at undetectable levels it’s been like this for the pasts 18 months. What could be stripping the nutrients away. I have a little skimmer that came with this all in one tank and it’s on for about 6hrs of the day. Will this be fine for sps ? Thank has been stable with other parameters.
Alk 9.2
Mag 1425
Cal 430
5 gallon water change once every 3 weeks
Alk 9.2
Mag 1425
Cal 430
5 gallon water change once every 3 weeks