I made a major overhaul in my tank where I changed pretty much the way everything was arranged originally. That includes new rocks, cleaning the driftwood which by the way was full of poop and decaying remnants of bark, and it stunk pretty bad. I also drained the entire tank and cleaned up the substrate which was purely nastyness and black stuff that I thought the monster from the black lagoon was gonna come out from it. Don't worry guys, I had the fishes in a quarantine tank and 32 gallons of the existing water held in a container. I got this ! I bought "Caribsea Eco-Complete Planted Aquarium Substrate" and followed the directions on the bag. Even with a couple of washes the water still turned black but I didn't worry, those are good nutrients flowing. Anyways, I replanted everything in patches using the new substrate. Whatever was left over I sprinkled on top of the existing substrate sparingly. The water parameters were good since like I said, I put 32 gallons of the old water back plus whatever was in the sump. The next morning I made a 25% water change and later acclimated the fish to the new environment using the drip method and they are doing great, a little lost but great. Has anyone used this substrate before? Have there been any improvements with the plants? I'm hoping I didn't waste my money.