Using water from RO/alkaline filter for my tank ?

[M.royce.92]

I just got an RO filter with an extra stage to remineralize and make the water alkaline (9 PH). I’m wondering if I could use this water for my planted shrimp tank if I add something to reduce the PH ?

[uuaaayyy]

Adding something, then adding something else to combat the first addition is not the best practice. And any addition (instead of dilution) should increase TDS.

If you are using pH lowering substrate, any water with KH shortens life of substrate and creates KH and pH fluctuations, you can check this by testing water after water change for KH and pH every few hours. pH, you don't need to change it (if this is livable for animals water, not pH 9 that has not to be used for them).

If this tank is intended for shrimp, using RO water and shrimp specific remineralizer, like SaltyShrimp, is more predictable and reliable way.

[M.royce.92]

Thankyou ! The advice is much appreciated