I mean I have had a running disagreement with Prime on this forums for some time. He states things as "fact" that are not and when challenged by me with quotes and references and I ask him to provide the same, he is unable to. All those quotes and links I post intimidate many folks and they take me a lot of time to post. But I tend to trust the work of Ph.D.s over the statements of an anonymous user name who refuses to give his credentials or work experience to back up his credibility. And refuses to provide links which would do so.
I have finally decided to simply say he is wrong and that folks can go here and read why. Then readers can choose how to proceed.
What I will tell you is that based on your plan to have a heavily planted, co2 gas supplemented tank, almost everything you have gone through regarding cycling has been a complete waste of your time and effort. Imo, and that of plant gurus like Tom Barr, there is little or no need to cycle this sort of tank. Plant it, let the plants establish, then stock it. No cycling needed in most cases.
I have been able to set up a tank such as a 29 gallon and have it fully cycled and stocked in several hours. All I do is combine lots of plants with seasoned media and its good to go. How do I know it is cycled? I dose a small amount of ammonia and test in about 90 minutes. if I read 0 ammonia I know Its likely safe. if I have any doubts I test nitrites and if they are also 0, I amm 100% sure and I put in a full fish load. If I get any ammonia or nitrite reading, I will finish up by doing a mini-fishless cycle. The amount of bacteria I might need are minimal because the plants do most of the bio-filtration. So my colony takes a day or two to get the minimal amount of missing bacteria in place. So in your case using the method suggest by Prime is the wrong way to go. And it is the wrong way to go as well if you are trying to have an acid water tank. The application his method is best suited for is an African rift lake tank.
In your heavily planted tank you have grown a colony of bacteria which are going to be starved out of existence in the long run by the plants will literally eat their lunch. So what was the point?. Moreover, most plant sites will tell you that the best approach to planting a new tank is to give the plants which go into the substrate some time to establish their roots. Often fish will pull up new plants trying to eat algae off of them or by digging in the substrate for other things. This is especially true for the more delicate foreground plants
Here is another piece of advice. Unless you have no alternative, do not mess around with your tap water chemistry. Adding chemicals and buffers and things like wood, peat, baking soda etc etc. will cause more problems for most folks than they will solve. Yes there are instances where there may not be any other options, but they are the exception not the rule. The first way to avoid most of the pH drops associated with cycling problems is not to dose so much ammonia. I have always stated on this site and will always continue to say that one should not dose to 5 ppm even though it is the maximum number often suggested. Next is to understand that nitrite and nitrate and especially co2 do create acids which contribute to lowering pH. How much is a function of one's buffering aka KH. There is more to it than just some free H+ ions from the first stage of nitrification most of which get used up in the next phases. Moreover, nitrous acid inhibits nitrification and the higher the pH, the more of the nitrite will be in the form of nitrous acid.
If you are of a more scientific bent here is a pretty decent explanation of what is going on in terms of nitrification
http/nitrification.org/