Our Koi pond one year later is great! I emailed Rob to change out my UV lights as my water was not remaining clear. He did so and showed me how to do it myself. Rob and his wife are gpod people, very honest, and offer great service. I listened carefully to how he thought my pond should be constructed and filtered to keep algae to a minimum. I did everything Rob said — and he was right. Pond Perfecter is a great, honest, very knowledgeable company if yu have Koi or need a pond built.