I use RO Water and Fluval Shimp Mineral Supplement right now. I have Salty Shrimp GH+ /KH + on the way though. I keep my temp at 73 degrees, and I get a TDS reading of 200. GH is 8, and KH is 3, PH is 6.5, there is just a touch of ammonia, nitrite, and nitrate right now. There is moss on about 1/3rd the floor of the tank and two moss balls, and a couple of plants. I have a sponge filter, and back filter with sponge on the intake of the back filter. It is a 10 gallon tank and I have a small 2.5 gallon tank for emergency.