So I had a fully cycled tank after 7 weeks. Readings were:
Ammonia = 0
Nitrite = 0
Nitrate = 5-10ppm


Now each day for the past week I'm getting a small Ammonia reading. Around .25ppm. But my Nitrites are ZERO. I find this odd because I know Ammonia turns into nitrites. So can this be accurate of a previously fully cycled tank? I haven't done anything differently besides add one fish. It's a 75 gallon tank.
Is there anything besides time that will fix it?

Thanks

edit: I should add that all the fish seem just fine.

API liquid tests for ammonia give me a 0.25 ppm false reading all the time. I think part of the reason is they test for ammonium as well, which is harmless to fish and harder for nitrifying bacteria to break down.

Just my experience though.

__________________
Officially fishless until after the move....tune in later for details!

If your test read zero before, it seems it wouldn't be a faulty test kit. You are fully stocked now, right? What are your feeding habits?

If you want to test your kit, test your tap or stop feeding for 4-5 days and see if it goes away. I used to think mine read wrong, until I figured out it was my feeding habits. Just happened on occasion.

Add more plants.

So there's no ammonia in tap water at all? If it reads .25 it's a faulty test?

Only if you know that you dont have ammonia in your tap. The idea is just to test something else to see if it changes.

Did you do any water change with tap water. If there is chlorine in the water, it will kill the nitrifying bacteria. Which may cause ammonia to spike.

But it could be a problem with your test kit too.

__________________
Do join me on my shrimp adventure at www.klimshrimps.blogspot.com