My tap water is nasty. It's working fine for my South American Cichlid/Gourami and my African Cichlid tanks, but I'm starting a reef tank so I got an RO/DI unit. Since my betta will only be having 20 gallons, I can use RO/DI on it since it's like 2-4 gallon water changes a week. Unlike saltwater where I can just use the synthetic salt to replenish minerals, I cannot find a powder/solution to add to RO/DI water to make it ideal for Bettas. I am aware of products like Seachem Equilibrium, Seachem Fresh Trace, and Alkalinity/Acid Buffers. I'm trying to know what I need and don't need, using as little as I need. I don't understand why people say to use both Alk and Acid Buffers, can I not just use less Alkalinity Buffer instead of adding some and then adding Acid Buffer? Could I find the ratio of each powder per gallon, and then use this to throw the powders together into one big container, taking out scoops as necessary?