I had a male silver/black angel. After many years he passed. But before he did I got a female koi angel. I have seen them lay eggs. So I got a marble angel. Unknown sex. Here is the strange thing. If I have the white plant light one the marble will keep pecking at the koi. If I have the blue night light on the marble will not chase or peck at the koi. The koi may peck at the marble every once in a while. Reminds me of how the old angel and the koi got along. I want to be able to use the white light for plants. Has anyone seen or know what is happening? I have a 60+ day return policy.