Ultimate goal for 120 gal planted was to eventually achieve water quality for discus w/ temp 82 degrees. Starting tap water very soft. Thought, after watching multiple videos, that i needed to put some crushed coral beneath my gravel as a substrate (1 "). Now 7 weeks after planting my aquascape with 2 large pieces of drift wood, lots of tannis!, lots of plants that are growing well, and good lighting, my ph is 8.2 +, GH & KH 300. Corey says just look at plants and algae (life) and not at numbers. Do i need to start over, remove the crushed coral layer, and put just gravel? Or should i sit tight, feed my plants easy green and just wait? (Ammonia 0.50, nitrites 0, nitrates 0). No live things yet except hitchhicker snails from plants orders). Hate to start over but would really like to try for discus some day. (and time is short as I am 74!). HELP!