I agree with Cway! Unfortunately chances are you have a super Delta that has some crowntail genes in it as Cway said. Personally I love the shape of the traditional plakat more, but also because Halfmoons are so hard to take care off and some do not even actually swim right anymore because of the oversized fins
Yes Indian Almond leaves (dried) or called Ketapang leaves make sure they are fully dried and crispy, depends on how big your aquarium is, you can put 2 inch diameter to 4 inch diameter for starters, the color will turn brownish which is ideal.
Do not worry in trying to make it flare from time to time, it does not stress them, well it does but it is like exercise stress.
TTFN
Arvin