Colin always says to put a picture on the back of the tank to make the fish feel more secure. Just now I put black construction paper on the back and one side of my Killie tank. Shazam ! Instant and immediate change in the whole dynamic. The fish exhibited very apparent spawning behavior within minutes. Totally blew me away. I have never seen anything like that happen so soon. Another benefit is that the tank looks more like real underwater. When Colin says do something, well then, do it. Also, Byron always says give the fish what they need and things work out well. He is absolutely correct. These guys are like the TFF Forums version of Charles Schwab. When they talk we should listen. My experience today proves that. Thank you gentlemen.