Got my first cichlid ever, a male Parachromis dovii. He is young, about 5-6", and it's currently in a 65 gallon acrylic tank temporarily until I purchase a much larger tank. I am using a canister filter for a 200 gallon tank. Currently, I only have several pieces of fake corral for decoration, and no substrate. I know I want to go with a black substrate. But I have no idea what I should use. What are some recommendations? Easiest to add, easiest to clean, least likely to cause filer problems, etc.