Have you thought of drinking a mineral water or taking electrolytes?
Discussion
Bruh I drink a gallon of water a day.
Mineral? Test the water, you're looking for high magnesium, potassium, chloride, calcium and sodium.
When I first went carnivore I was salting my meat and drinking water mixed with various salts and supplementing magnesium.
I would get light-headed/dizzy when standing too quickly.
After a while I stopped all the salt (don't even add it to meat any more) and now I don't get light-headed any longer.
I do sometimes drink mineral water, mostly because I enjoy the bubbles in carbonated water. Mostly I drink very pure water (fluoride removed).