Review on CNZ Aquarium Flourescent Aquariums Landscaping by Susan Lautner

I had 3 fish die until finally I found someone to come and look at my aquarium because all my pH levels were fine but my fish were dying the person came out and said they are stones. I washed these rocks before putting them in the aquarium but didn't notice that the black stuff they sprayed on them kept coming off and the fish couldn't breathe. Please do not buy for fish. I threw mine away. RIP to my 3 fish friends, sorry I didn't know.