@grantm91 Yeah - API is good for a rough baseline. Once you start getting into the smaller details, you want to know a more precise value with a test that can test in the lower-range. I use Salifert for my Nitrate tests, I got it off eBay for $15, it's a good alternative as oppose to one of the most expensive brands. Red Sea's test kits are like easily in the $30, balling @stella1979 The Salifert Nitrate test will give you a better reading than the API for sure, since it'll show you from 0.2, 0.5, 1, 2, and 5 PPM range. I will say though, when using the Salifert, it's hard to differentiate between 0.5 and 0.2 PPM, but at least you know it's less than a 1PPM value, which typically is what you'll need to know. By the way, I officially hate you guys! Since seeing all your new tank set-ups and rockscaping. I have a gnarly itch, I mean GNARLY itch to completely re-do my entire scaping with Pukani rocks... ugh. I think I mentioned that I've been unhappy with it since day 1 because I had to rush the process. Lesson learned for everyone out there, patience is key, and do it right the first time! But anyways, I think the wife would probably kill me at this point in wanting to re-do my whole rock work. I think I am going to keep myself busy with something else lol.