I have two tanks, a 40 gal breeder where the filtration is a hang on Marineland filter. There are LPS, SPS and rock nems. The other is a 25 year old 50 gallon NPS tank where the filtration is a 1990's wet/dry. I don't test or dose. In fact, the NPS looks horrible after a water change. The owner of the local shop asked about the parameters on the NPS tank. He looked at me like I was insane when I told him that I didn't know.