The 10g registered on . . consulting the geek of fish log . . . d:6. (today is d:8 of 8 since set-up)
The 5g is sort-of passively cycling (today=d:7 of 9 since set-up) in that the only thing I did was move the filter from the 10g to the 5g without cleaning the media. A bold & chancey choice because I moved the filter to the 5g the day after the first NO(2&3) levels registered. I did a chem on the 5g, moved the filter, replaced 20%-water just to be safe and retested. Chems registered 0.25/0.00/0.00. I left that little bit of ammonia alone. This morning the chems were exactly the same.
The 5g is my party-of-five holding tank, so I have to be careful not to mess up the invertabrate's enviro before they can go to work in the 10g.
I agree w/you re:color charts for my API kit. I have the same issue & no color probs re: my eyesight. I was hoping that if I rolled the tube over the color bands, the color on the correct band would disappear through the tube; i.e. not be able to distinguish the band underneath. Some little color detail in my brain made me try it. 3D glasses or camera filters, mebbe?
Here's something else I noticed, wonder if you have noticed this; I do my chems first thing in the morning, if I get distracted pouring coffee or whatever, sometimes I do not dump the tubes right away and wash them for the next tank. I find the colors in the tubes intensify despite the fact I have waited the required developing time. This happens sometimes on the first tank, others on the second, sometimes both, on days where I am doing more than two things at a time.
Regarding your chems; NO(2) takes longer to register/spike than NH(3), so too NO(3) takes longer than NO(2), due to the fact that they develop sequentially. Below I will add a link to an excellent tutorial from another group that I am using. Additionally, my opinion is that the NO(2) slower rise is not a matter of time/distance (thinking linear here) 1 to 2 vs. 0 to 1 but just a function of developmental sequencing. In other words, no more effort to get from 0 to 1ppm, than to get from 1ppm to 2ppm, despite the fact that things seem to be crawling for a few days.
I have not dosed the 10g w/ ammonia for oh, hmmm...6d because the formula I am using is a dose-&-wait method. In this method you wait for your NH(3) to drop to 0ppm or 0.25ppm maximum ppm before dosing with NH(3) again. It is a longer method but the end result is a more stable tank at the end of the cycle. Today, I dosed to gain 4ppm NH(3). I am sure the draining, moving & refilling with the same water of the 10g last night upset the cycle for a day. I will know tomorrow or Wednesday when I do chems.
Keep us posted!
Fishless Cycle method I am using