FishFanatic04
I'm in Planted School.
API tests total ammonia (ammonia plus ammonium) in it's results.
From Seachem's website: A salicylate based kit can be used, but with caution. Under the conditions of a salicylate kit the ammonia-Prime complex will be broken down eventually giving a false reading of ammonia (same as with other products like Prime®), so the key with a salicylate kit is to take the reading right away. However, the best solution ;-) is to use our MultiTest: Ammonia™ kit... it uses a gas exchange sensor system which is not affected by the presence of Prime® or other similar products. It also has the added advantage that it can detect the more dangerous free ammonia and distinguish it from total ammonia (which is both the free and ionized forms of ammonia (the ionized form is not toxic).
How is .50 mg/l ammonia safe for fish?
BAM! in my face. I wasn't exactly arguing with you. I was just saying that test readings will show ammonia if your tank isn't cycled, even though you use prime and it's safe for your fish.....for 24 hours at the most. AND if your tap water has ammonia.
When I do a 50 % water change my ammonia readings show .50 ppm ammonia. The next morning it will test at zero in a cycled tank. My tap water has 1.0 ppm. My filter will convert that quickly, but it will still show up on the API master test as 1.0 ppm ammonia right way if I did a 100% water change.
My point is that the tests will still show the ammonia as toxic, even if it is not.