Converting directly from your recipe to dry dosing:
500ml of water, dosed at 10ml per 50l of aquarium water, is 100X 5ml doses into a 25l tank.
So divide all dry components by 100X. Comes close to 1/32 tsp. for nitrate, but all others (with Plantbrain's modified Mg suggestion) are closer to 1/128 tsp.
If my maths are correct, that is.
Standard EI dry dosing recommendations for a 10G, high light and heavily planted tank with 50% weekly water changes are larger, and within the realm of common measurements. But notice that there's quite a few assumptions in that statement, that I'm not sure apply to your intended setup or goals.
Using the distilled water and vinegar trick for the micros, there's no worries at all about chelation/precipitation. And that trick isn't necessary for the macros. I prefer liquids myself, because with one bottle and one good ml vial, I can go around and dose up every tank in quick succession; regardless of large or small.
The amount of carbon provided by liquid carbon supplements is a small fraction of that provided by real CO2 at typical levels (30ppm). So while they are additive, most people just go with one or the other, depending on the actual carbon needs of their setup and desired growth rate.
Also, if you're inclined, I'd contact Aquarium Plant Food UK, and see what their rationale in such a large Mg dose is. I'd be interested to know. And if it was a math error or typo on their part, I'm certain they'd want it brought to their attention.