Hi , so my tanks are bare-bottom and until year 1 is done I always need to manually boost Nitrate and phosphate to keep at least a minimum reading on my tests. Since this style of reefing is becoming more popular, I want to share an observation. It's only an observation, not a scientific analysis. But I usually dose B ionic Nitrate which is Calcium Nitrate . I ran out and went with NeoNitrate from Brightwell. I like Brightwell products, except the Nitrate in this additive is a "propriatory" Nitrate. I don't do regular water changes at all in this first year of the tank in question and don't dose anything except Alk and Ca. So somehow my potassium tested at 390ppm a few months ago. Today after week 3 of regular NeoNitrate dosing the same Salifert K test kit shows 460ppm of K. My only possible suspect is the NeoNitrate. I will stop and use another brand to see if K drops . But in case you're dosing Nitrate, I wanted to give a heads up for you guys to check potassium just in case it is actually affected by dosing Brightwell or any Nitrate.