I'm not sure.. I think if your cycled it shouldn't make a difference. Using Prime conditioner couldn't hurt either. There's really no way to know unless you do a wc on a cycled tank and test after you do the wc.
I just tested it in my bathroom and it's around 2ppm in here. Kitchen sink is about 3.5ppm. Which is odd, considering it comes from the same place. I'll just work with what I have and keep testing as I cycle.
Also, I posted this question in another thread but no one is replying. Should I put my live plants in before I cycle or after?
Can I put plant in after the cycle with out any harm being done?
Will a plant in there during a cycle mess up the results?
I had several plants in my 10 gallon during cycling and it didn't seem to noticeably disrupt anything. Sure, it may have extended the cycling time by not allowing the ammonia to spike too high, but the job got done nonetheless.