Lower my nitrates?
I use the Berlin Method on my 2-1/2 year FOWLER setup (65gal with proflex sump). My nitrates have always been high (40-50ppm)but lately I have been trying to lower with little result. In the last 2 weeks I have performed two twenty Gallon changes and a thirty Gallon change last night.They are now about 30-40ppm. My SWC protein skimmer was not working well for about 6 month's and I finally found that the air intake was clogged, fixed that about a month ago. My tank or sump area is all in good working order now. I have noticed greater growth on my rocks and have lost a few of my favorites...yellow eye Kole, Fat Lawnmower Blenny and a large Coral Banded Shrimp. 6 fish present in tank now. Any suggestions would be appreciated.
Gloucester , Va.