Oh wow okay! Thanks for the great reply. Was thinking 6.3 was on the lower level. I will go even lower then! Thanks for that advice. What do you suggest for that top compost layer?
Do you suggest i change up what im feeding with at all or just go less/straight water?
Ive got Fox Farms trio, liquid karma, cal mag, seaweed extract, molasses, fish guana, recharge, mykos/azos.
Thanks!
6.3 is a fair ph for soil... Which OF really isn't. It's more of a hot compost with peat. In simplest terms, metals need to be slightly more acidified in a "hydro" element for proper uptake.
Any quality compost will do, even EWC. Both contain readily available nutrition that won't burn your plants, beneficial bacteria, and more organic matter which will offset the peat slightly. Peat has a slightly lower CEC, but the organic matter makes up for it. While that won't defeat your ph issue, it will provide bacteria that will form a symbiotic relationship with your roots and pretty much make ph obsolete.
If you are going to top dress with compost/castings, just plain water for a week or so, then feed. However, try to get at least one watering at 5.5-6.0 in between adding the microbes. They don't like ph or environmental changes, so best to do it before adding them.
Out of that lineup, I would start feeding the kelp extract and microbes first, then start bumping what's needed as its needed. Kelp is very beneficial for unlocking nutrients that become bound. Microbes love kelp as well, plus it has lots of trace elements.
All in all, try to look at it as feeding your soil, and letting your soil feed your plant. Nutrition is important, but making it available when needed is more important.