how to make acidic tank

Hello everyone, how is it going? We have a garden with some interesting palms. As with so many plants, they require maintenance, including trimming. We have the species Livistona chinensis. This plant produces a kind of fiber that resembles coconut fiber. Does this have some application for a...

Right now my tap water has the water parameters: Total hardness (GH): 25 Nitrate: 0 Nitrite: 0 Cl: 0.5 Carbonate (KH): 15 pH: 6.4 And my tank: Total hardness (GH): 50 Nitrate: 0 Nitrite: 0 Cl: 0 Carbonate (KH): 20 pH: 6.4 As you can see I have very acidic water that isn't to chlorinated. In my...