I have high ph tap water and I heard R/O water was lower in pH. How hard is it make your own R/O system and what does it involve? What are the benefits? I am sorry if this has been covered a lot already. Thanks for any help.
I believe it's just about impossible to make your own R/O system, or at least I've never heard of such a thing being done.
The benefit of R/O water is that it is just water, H2O and that's it. No hardness, no chemicals, no nothing. What you would do in this case, is mix your R/O water with your high ph tap water to get softer water since using R/O water would cause your ph to crash horribly due to the lack of buffering capacity.
But, if your piranhas are fine, I don't see a need to go through all the hassle of an R/O setup, just keep the ph stable and they'll be healthy.
I just leave peat moss in the filters all the time. If I don't the hardness of the water along with the tap pH cause it to soar. (8.8 or higher) The fish lived fine but they are much moe active since I lowered the pH a little.