Apr 2, 2012 #1 Tan_Nguyen1979 Aquarium Advice Newbie Joined Mar 27, 2012 Messages 9 Hi, Can somebody explain to me what is the Geo Kalwasser do please??..
Apr 3, 2012 #2 OP OP Tan_Nguyen1979 Aquarium Advice Newbie Joined Mar 27, 2012 Messages 9 Well, I guess not very many know what it's for.