Does anyone knows how to purchase the reef ceramic rock of korallenwelt in USA or Germany?I'm just wondering it may be better then FRP and I wanna use it in my new tank to place some corals.I've ever heard also the FRP may causes some chemical reaction and release some poisonous elements into the tank.due to this point,I think I can choose only L/R or C/R.Do you guys have any idea to give me a suggestion?or does anyone using it?hope you guys could help me and I'll be very appreciate it.

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