Bests & Worsts Reviews from Amazon

I bought these for my fairytale fish tank. Wash them several time before putting in my tank. With in the first 24 hours my tank was milky white. Added solutions still nothing. Change water.cleaned all decorations, Reset tank. Again milky. Left for five days. Ten fish die at once. I have had the same fish for about ten months. I finally removed these rocks and took water samples and the rocks to a fish specialist. ROCKS are toxic. I do not recommend for fish tanks. Pretty but deadly