Im starting a new tank and im thinking of things to put in my substrate. Im allready going to put a mixture of peat and clay as a bottom layer. I understand the importance of peat in the aquarium and how its an organic carbon source for bacteria and High CEC (nutrient holding capacity). My question is that has anyone every heard of, or used, canna coco growing medium in their substrate. I dont want peat to lower my ph & gh to much so im looking for alternitives to add organic carbon. Im not saying im ditching the peat but maybe in conjuction with the coco medium. Any thoughts or Ideas for a great substrate for my new 65!!!!