The best mix I've found is using a 2:2:1 ratio of Masterblend 4-18-38, Calcium Nitrate 15.5-0-0, and Epsom salt.
I use this online calculator for the right mixes and mix the dry powders on a kitchen scale, then into the water.
Then I'll add in some Hydroguard using the chart on the bottle,
and a few crushed up bits of a Mosquito dunk into the main reservoir.
This should cover almost all your macro and micronutrient needs for just about any plant I can think of, as well as provide bacterial protection against both waterborne insects, and bad bacteria that cause root rot; especially in warmer climates or outdoor systems.
I hope this helps!
Mosquito Dunk in a bucket of water for at least 24 hours then use that water to water your plants. PH it and anything you normally would. Do that for a few weeks to kill the larvae and get some yellow sticky traps to catch the adults. You can reuse the same Mosquito Dunk for 1-2 months before replacing it so they are pretty economical. You can also crush a piece of a Dunk up and mix it in the top inch of your soil. Also make sure you have a fan blowing around to keep them from landing and laying eggs.
https://www.amazon.com/Gideal-20-Pack-Dual-Sided-Whiteflies-Leafminers/dp/B07QKLHH5X
https://www.amazon.com/Summit-responsible-solutions-110-12-Mosquito/dp/B0000AH849