How is it possible?

[ILLUSN]

you should have some nitriate, its the end product of the nitrogen cycle, are you reading the tests with a white card or papper behind the tube? the white background makes it easier to read.

[jeffa]

yep i put a white paper behind it

[Goerge_of_the_Jungle]

mate - here is what we have ruled out:

-Its not because you have plants - It's a BB tank.
-Your test kits AREN'T out of date - LFS has tested your water.
-Your test kits AREN'T contaminated - Again, LFS has tested.

Here's what i think:

Your filter's biological filtration is spot on - your bacteria colonies are so dense - their destroying the bad bacteria as soon as it hits the tank - Your tank is BB - so your fish can see the food more easily on the bottom - meaning less Ammonia - all up - your doing what any fish keeper should be doing - keeping the water in A1 condition.

Here's what i recommend you try:

-Take a sample of water to a different LFS - have them test your water as the test kit at YOUR LFS might also be out of date/contaminated.
-Test your water BEFORE you do any sort of water change or add any sort of chemicals.
-Have a fellow fish loving friend test your water with HIS/HER test kits.

If everything tests spot on - your doing a fantastic job - also - are you adding much 'raw' bacteria to your tank - such as cycle?

[jeffa]

all i add is prime to my aged water for atleast 24hrs b4 adding to the tank

[Hollowman]

I used to get the same readings on a tank I had a few years ago, it was a 300 L tank with 2 eheim 2217's on it. Stocked with 11 adult discus. Like George says, the cycle is working at an optimum rate. No worries from me. Keep it up.

H

[jeffa]

i put 2 beef heart blocks into a cup of water over night & tested it now for ammonia with my test kit and it showed a ammonia reading...so im guessing my tst kit is fine?

[hvt200]

yes jeffa