I mixed some General Hydroponics Veg/Micro/Bloom in a Veg mixture (3-2-1) without any water and left it in a pint water bottle over night on my shelf (in the dark). The next morning, the bottom quarter of the bottle was white precipitate. if i heat up my solution, will the precipitate disolve back into the solution? will it be usable again?

why do precipitates form when you combine the solutions and not when they are sitting in their separate bottles?

if some1 knows, dont be afraid to hit me w/the science, i can handle it!

Thanks!