I've had this tank doing fishless cycling for 21 days so far...unfortunately, things aren't doing as good as they should.
The nitrate test kit seems to be malfunctioning on the tank water, even tho it is showing up perfectly fine on other tanks. (i.e. I use the API test kit with 2 bottle for nitrate test. Normally, the first bottle will make the water clear yellow and the 2nd bottle will make the orange/red show up if nitrate is present. however, on this cycling tank, the solution turns immediately to a orange/brown tint after putting in bottle #1! The same test kit is doing fine on 3 of my other tanks)
The nitrite seem to be out of control depsite a few 40% water change...by out of control, I mean, I get 5+ nitrite reading with the tank water...and I get 2-5ppm nitrite reading even when I mix 0.5ml of cycling tank water + 4.5ml of 0ppm nitrite water. (which kinda suggest the cycling water has nitrite of 20-30ppm
I am thinking the nitrate test kit is not working because of the excessive nitrite...is this possible?
What should you guys suggest I do from here?
Wait + dose ammonia regularly
Keep doing water change to try to bring down nitrite?
Do water change and add ammonia?