It's been a long time since I've had a fish tank with live plants, and I'd really like this next one to be planted. The tank will have 2 dwarf gouramis, 2 killifish, 10 neon tetra, 2 african dwarf frogs, and maybe some cherry shrimp. pH will be around 7 and temp will be about 77 degrees F. I'm thinking about water wisteria, java moss, amazon sword plants, and some marimo moss balls but am definitely open to other suggestions. LED lights will be on during the day and off at night. Should I be fertilizing the water or substrate? Is there anything else I need to add to the water? I'd like to have black sand as a substrate; will that be a problem? I'm planning on using these plants to help cycle the tank.