Which to trust

pickupman66 · Dec 2, 2013

So... I have been testing with my Salifert kit for Nitrates. Lowest I can seem to get it is 25ppm. So, just for pure joy, I tested it with an API kit I had. tested between 5 and zero ppm. HUH?? So, which is correct? I kinda want to lean API because:

1. I have done 2 50 gallon water changes in two weeks
2. It tested at 25 before and after each water change now.
3. Phosphates are .03 per my Hannah.
4. water looks invisible.

Thoughts???

I want to lean to the Salifert because they are supposedly better test kits.

Dowtish · Dec 3, 2013

I'd say figure in between the 2. Thats about as precise as you can get anyways. You could order a different brand kit like a red sea or elos and compare as well.

pickupman66 · Dec 3, 2013

Im thinking ll mix up a few cups of new water tonight and test it with both kits. with 0 on my tds meters I should not have any nitrates in newly mixed waters.

just tryin gto get over these tank health issues I have had. I need a good recovery here.