Originally Posted by tiffa
Brilliant Rives, you have saved me buying a load of 13mm fittings, happy days. I've done a few rodeos but I'm not too up on RO water, I got near GPW last time (Finally after many rodeos) but always wonder if i could do better with RO water since my hardness is 0.8 . What are the main advantages of RO?
Are the systems pricey Rives?
It's reassuring to know you are still using the system after so long!
As I understand it, the problem with excessively hard water is that it can contain high enough levels of nutrients that it can throw off the balance of what you are feeding the plant. Commercial nutrients are compounded around "average" water, and include the water's nutrient levels in the calculation for meeting the plant's needs. For instance, my water is abnormally low in magnesium and will not hit necessary levels even with a chem nutrient that is considered to have a high magnesium content. I recommend that you start with a water analysis to see what your baseline levels are, and if you are comfortable with spreadsheets, the nutrient calculator in my sig line is invaluable. If you are on a utility for water, they should have a water analysis available and it is frequently posted on their web site.
I've never purchased a RO system, so I don't really know what their purchase or operational cost is.