Consider the equation $$(x+1)(xy+1)=z^3,$$ where $x,y$ and $z$ are positive integers with $x$ and $y$ both at least $2$ (and so $z$ is necessarily at least $3$). For every $z\geq 3$, there exists the solution $$x=z-1 \quad \text{and} \quad y=z+1.$$ I would like to know under what conditions there exist (or do not exist) other integer solutions with $x,y \geq 2$. More specifically, I am interested in the case where $x$ and $y$ are 'close' in the sense that $x^{1/2} \leq y \leq x^2 \leq y^4$. Moreover, $z$ may be assumed to be even with at least three prime divisors. Thank you in advance for any advice. Edit: there was a typo in my bounds relating $x$ and $y$.