If you want a Tonina tank, build a smaller tank for it, as hard as your water is, you would need to cut the RO with tap 80/20 or 90/10.
No need to add a bunch of crap back to it either. Just the usual KN03, P04, Trace, C02.
If you have a KH/10, cutting it 50/50 with RO would give you a KH/5, that's how it works, it does not work that way for pH.
So for the Tonina, they very much like at the most a KH/5 to have any glory, and then, you will need to know what you are doing with the light's/fert's/C02, dont add any fish, maybe some cherrie shrimp to start out with, use pure RO if you want, just learn the plant's, they do like a low KH.
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