I recently bought a house in So Cal and the previous owner left this dwarf citrus. I'm wondering if anyone can help ID it (I'm guessing a variety of lime). Light , bright yellow/green color, very small & sporatic thorns.

Also, I'm wondering what infestation/disease/problem it has, and how to remedy it (yellowing leaves, very small , black specks on yellowed areas. Thank you!

I have several different types of citrus and everything looks like a lime to me at this time of year, so I'm no help. I would not worry about the spotty leaves, but your little tree probably would benefit from some citrus fertilizer.

Definitely needs some citrus food.