Originally Posted by mdaniel2882
API....I know my nitrates pretty much stay under 20. with all the talk about 0-5 ppm
for corals I don't want anyone to think they need to do an emergency PWC
if they see them at 10.
I also think that less than 20ppm is ok. However, 0-5ppm Nitrate is very possible. I have used those API test kits and for me it is easy to get a 0 reading opoosed to a 5, 10, or 20. The 0 is completely yellow and anything else has a hint of orange in it. The more orange color the higher the Nitrate.
Reasons for Nitrates over or close to 20ppm may be, under-skimming, over feeding, heavy bioload, not thawing and draining frozen food, too small or too infrequent partial water changes. etc etc.
I think it is the people who have mainly sps
reef tanks, like myself, that strive to be as close to 0ppm as possible. Sps
grow faster and have better color with "cleaner" water.