RO/DI water, now what?

[litlfishy]

I just purchased a new RO/DI unit and I'm not sure what to add to the RO/DI water? For saltwater do I just add my salt mix, or do I add some other type of conditioner? For freshwater, what do I add, if anything at all? Thanks for the help!!

 

[jumpfrog]

Salt mix should be all you need for saltwater. As for freshwater, I don't know if I would use Ro/DI water. You wouldn't have anything left to buffer the PH and could find yourself with wide swings.

 

[slick]

Originally posted by jumpfrog
Salt mix should be all you need for saltwater. As for freshwater, I don't know if I would use Ro/DI water. You wouldn't have anything left to buffer the PH and could find yourself with wide swings.
Just wondering what you think buffers ph in tap water?
Use RO/DI water just add your salt mix and heat it up and keep it moving with a powerhead. Let it sit about 24hrs

 

[jumpfrog]

I might be out to lunch on this as I'm still learning the water chemistry. But I was thinking that if the RO/DI removed most of the minerals and impurties from the water it would make it very soft as in dkh = 0. That might be fine for discus or something needing soft water; but, try having a mbuna tank and keep a ph at 8 with nothing to buffer the water?
Am I missing something?
At any rate. For saltwater, keeping to forum, just adding mix should be all that is needed.
Cheers