Ruud Posted November 4, 2022 Share Posted November 4, 2022 Hello all, I have very hard water here in Spain and have been starting running my own RO unit since a week to improve the water on my planted tank. I have also been playing around with a PPM meter. My tap water runs at around 340PPM whilst my tank is around 380ppm at the moment, after a 30% water change with RO water at 45ppm. My question is.. after a water change I am adding fertilizers and such for my plants. Is my assumption correct that these would be increasing my PPM levels again? What is a 'healthy' PPM target for a planted tank with substrate in general - if there is such a thing? Pardon my ignorance 🙂 trying to understand it all and improving my water as much as I can now I finally have a RO unit. Cheers from Spain Ruud 1 Link to comment Share on other sites More sharing options...
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