remineralization

Hey everyone, Ive decided to buy an ro system and will need to re mineralize the water. Ive heard that there are a few ways to do this; what would you suggest, something pre mixed like sachem equilibrium or a custom mix of nutrients / minerals. thanks in advance.

So I've been looking at getting an RO unit for a while now, and seeing very good units from a site for $100 I'm inclined to move on it. Once its set up and putting out RO/DI water, how do I remineralize it? what do I use? If using only RO/DI water in a tank, then can I use an inert substrate...

Hi, My L.A. County tapwater is very hard (8dKH, 12dGH), alkaline (pH=8++), has recently been turning in about 20ppm of Nitrates, 0.5ppm of phosphates and God-knows-how-much of silicates. With fishload, even with a planted tank, I'm finding it difficult to maintain 40ppm of NO3 (API test), so my...