That’s very interesting!
I use mineral rock dust as an organic supplement for my soil.
I regret not studying botany as well, the gardening bug hit me too late.
I hate how they call sand “تربة زراعية” too, there’s nothing زراعي about it.
It’s amazing how you saved your aunt’s tree. I find the chemistry confusing, so I’m glad that my compost solves everything, so I dont have to figure it out.
San marzano tomatoes are nice and pasty, jus watch out for blossom end rot, which can sometimes happen to plum tomatoes, usually its a calcium deficiency or uneven watering, I’d add eggshells to the planting hole, but with hydroponics you know your stuff. Grow Genovese basil, which is absolutely gorgeous and goes very well with Italian dishes. Best of luck! And keep me posted on your successes :)

Alzainah

Where did you find the mineral rock? It is called dolomite (CaCO3)? Your egg shells are the almost same thing. Thank you for the idea by the way, Kuwait tap water is soft (low dissolved minerals) since it is basically desalinated sea water. I think they use reverse osmosis? which would explain the soft water. So eggshells would increase the mineral content (increase hardness) since the new leaves on my plants seem twisted, possibly from a calcium deficiency.
It is true, there is nothing زراعي about it. I suspect it is just rinsed sand from the sea (it has a high carbonate salt content, add vinegar and it will bubble vigorously for 24hours+ !)
Chemistry is not that confusing, life is basically chemical reactions but I won’t bore you with the details :P
It seems that your compost is quite good. Perhaps some day I’ll try it. Thank you for the tips, hopefully they will be implemented quite soon.
Thank you for your kind wishes, I graciously extend the same towards you Green Thumb ambassador of Kuwait.
Bader