Hello, Anyone have any experience with Caribsea's "African Rift Substrate"? I have an 8 week old 100 gal with mixed Malawi & Tanganyika Cichlids and some multipunctatus cats. I also have wood in the tank, I understand that will drop the ph some.The water comes out of my tap with a ph of 7.8, wich is where the tank started. I made the mistake of putting regular gravel in the tank. Now the ph is running closer to 7.0. I know I need to get the ph up to 8 - 8.2. I don't like the look of white crushed coral and would prefer the look of natural colored substrate. Any thoughts? Thanks!