What kind of plant is this?

I'm from Croatia, this plant doesn't really grow there naturally. People grow it in flowerpots and keep it outside in summer and in Winter bring it indoors. It acts like cactus, doesn't require much water, soil is always dry and leafs are fat. I have 2 pictures, first one is before I ruined it with too much fertilizer (NPK). It lost few leafs after that, and now as you can see it needs sunlight so I took it outside. I would be really grateful if you could tell me Latin name of this plant, and does it belong to the Cactaceae family? Thank you! :)

Re: What kind of plant is this?

Reply from Kathy C

Hi, Bole,
A little tricky to tell from the photo. Are the leaves fairly rigid, edged in dark spines, and blue- to grey-green? If so it looks to be Agave americana - Century plant. If the leaves are softer, with softer spines, and ooze a clear, gelatinous liquid when cut, then is is Aloe vera.
Kathy C