Getting Beyond the seedling stage

Not a fan of bottom watering either, especially with soil less mediums...........incorrect principal altogether imo. Top down watering with run off each time would be superior. Your substrate has zero nutrients, you will need to feed from day one basically........neither product you list will have the necessary N-P-K needed for plant growth. you will need to use a "grow" type fertilizer in conjunction with what you already list. Also, when growing in coco, you will need to use cal/mag from virtually day one too.

The concentrations that should be used in soilless can be given immediately. Probably wasting some, but it is a net-benefit, too. Coco+perlite comes with zero nutrition. So, you need to provide 100% of it at all times. You should be giving a well-balanced mix of all the necessary nutrients. Bottom feeding basically takes one of the primary benefits of soilless method and throws it in the trash. Without a religious 10% runoff or more each time you fertigate, you will inevitably have buildup over time in your substrate. Not only that, but due to active transport taking place, your ratios of nutrients in the substrate will shift even if your formula remains the same. This will make diagnosing more difficult and fixing more difficult. Might even need a flush, which only slows a plant down and can be avoided nearly 100% of the time with 10% runoff waste water each fertigation. Problems may not happen all the time, but they will happen at a frequency above and beyond drain-to-waste. Every once in a while i'd give a top-down fertigation and get extra runoff. Maybe 1/week? Could try longer and if you run into unexpected problems, increase frequency of top-feed incrementally until you avoid future problems with least amount of added effort. This will reset the nutrition content to a balance more similar to what you feed than what would result from purely doing bottom-feeding. bottom feeding and soilless are not a good match. It contradicts the fundamentals. Bottom-irrigation and a super soil that requires little to no fertilization would be a good match.