Can my tank already be cycled?
I know I'm a little early to think my tank is already cycled, but it sure is acting like it.
I filled it the day before yesterday and threw in a bunch of old fish food. I've tested yesterday and today and threw a ton more food in after each test. I am using an API Master Test Kit and following the instructions meticulously.
Yesterday: pH 8 Ammonia 0-0.25 Nitrite 0 Nitrate 5-10
Today: pH 7.8 Ammonia 0-0.25 (little darker than yesterday; more decaying food in the tank) Nitrite 0 Nitrate 10
(The ones that are a range read somewhere in the middle. I got second opinions on all my tests and read them in different lighting to confirm the result.)
I'm running a new SunSun 402b canister filter with media from a cycled tank's filter (that has a catfish with a large bioload) and a HOB from a cycled tank. I added a little tank water from a water change, but it was only a fraction of the water in the tank.
With my cycled media and filter, is it possible that my tank is already cycled? I've been dumping tons of fish food in but I do have some weedy plants in there, so that may account for the low ammonia readings. But the nitrates have definitely risen.
I might make it to a fish store today, so I got a water sample ready so I can have them test it if I do.
Whether it's cycled or not, I won't be able to move fish in until the end of the week at the earliest, so I'll continue throwing food in and doing my daily water tests until then. Any thoughts?
(Also, please do not direct me to information on fishless cycling. I have read it already, before even attempting to cycle my tank.)
EDIT: I also have access to RO water if it would help at all for me to run a test on that and confirm that I'm not doing something wrong.
Also, I'll probably add test results here as the week goes by in case that helps too.
Last edited by Narelle; 05-22-2014 at 04:03 PM.
Reason: More info