Help me out. I have decided to change my 20g H to a 20g L. What light to use?! Hopefully you have seen a bit of my current setup. I have two dozen shrimp, baby shrimp, many different types of plants. I currently liquid fert/CO2. I have Kh/Gh test kit on the way. I run a Aquaclear 50, and a Sponge Filter (40). Fluval heater, I currently run gravel. I may entertain the idea of adding potting mix. But would gravel over that. Eventually sand,... Not this tank. My biggest question. What light for my tank? I need a high light for plants. And I would like the idea of a sunset/sunrise etc to move lighting from off to on etc, would like moonlight. Help me out? Thanks.