Sorry to hear with your issues with Dino's.
Fought them a couple times, and did multiple a week LIGHTS out, walls covered in thick paper so no light comes throught tactics then keeping pH high, while not adding new or any nutrients in the tank. barely feeding fish, losing every invert etc,
Been there done that, I feel your pain. Just be prepared when you win to do massive water changes as they all turn to dust after you win.