Eric Marsh of Mermaid Waterscapes was going to coat a waterfall and he gave me two people that loved him and the other reference I couldn't reach. That was good enough for me and I agreed to his terms. On the start date a person showed up at my house(not Eric Marsh). He said he worked for the "Durable Company" in broken english. I asked if Mr. Marsh the owner will arrive and he said that is not needed and that he is experienced. I was not suspicious at the time. I witnessed him cleaning the waterfall with a sandblasting machine and I clearly specified not to use sand but to clean up any mess. When sand and debris and algae ended up all over my yard I reminded this worker he would have to clean it up. He asked me for a broom as he was unprepared and had no cleanup tools. I should have stopped the job there and not paid him. After cleaning and promise to arrive the next day, I gave him his initial payment which was 20% less for cash. Bad mistake. The next day the same boy applied some yellowish liquid which I understood through his accent as polyurea. When he finished I noticed many areas inside the rocks and cracks not coated. The boy said when questioned 'they don't need to be'. When I argued and refused to pay the remainder of the money I called and spoke with Eric Marsh. He spoke with the boy and the boy said there was loose sand in the cracks and uncoated areas and that he would fix this. It appeared like he fixed it with extra coatings but the sand in those cracks should have been removed. I lost a lot of money on this job, I had no calls returned after this. To have it redone I must first undo this sloppy unprofessional job. That is my experience with Mermaid Waterscapes and Eric Marsh.