I've had my 90 gallon DT with a 30 gallon Sump running a carbon sock sponge at the end of the overflow hose and a Red Sea Berlin Protein Skimmer for three weeks now.
I always use RO
water for my water changes and have increased the amount I change from 5 gallons on week 1 to 12 galloons on week 3.
I don't have much livestock yet but lots of corals. I will acquire more fish when the environment stabilizes more. I got this tank from someone else who had it established for 8 years and i set it up the same way.
My readings from this morning are as follows:
6 peppermint shrimp
10 red leg hermit crabs
2 diamond gobies
I'm mostly concerned with the phosphate and nitrate levels. According to the API Master Reef test kit chart it's not where it's supposed to be.
I don't have an ammonia tester but last week i took a water sample to my local fish store and they told me there's a bit but not much and it will go away after a few water changes.
What should I be doing to reduce those levels before adding more livestock?
Any advice would be gladly appreciated.
Thank you all and Happy New Year !!