How much will bleach and color affect my curls?

I have type 3b/c dark brown hair, and I was planning on bleaching the ends to dye them turquoise in sort of an ombré fashion from my normal color. I want the turquoise to be bright, and I'm afraid the bleaching will damage my curls. Any advice? In addition, I swim competitively, so my hair is already dried out from the chlorine, but I rarely straighten, so it's not awful. All input is appreciated. 

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