You would probably want to stick with an organic nutrient or one that was considered good in semi hard water. For instance, General Hydroponics makes a hard water line that would probably be about perfect for that water that you have. Although, I really doubt it's available in your area. If you give your general geographic location you may find some growers in your area that are actually already doing cocoa that can give some more specific advice.
That's what I use, it would make your water just about perfect. You would end up using more calcium which you use quite a bit in Coco anyway. There are a lot of inexpensive reverse osmosis units and the big thing is how much of a storage tank you have. They can all make a good amount of water in a 24 hour period. But, if you don't have a tank large enough to store it you're kind of limited. So I put a 14 gallon tank with my unit and about 40% of that is actually an air bladder so I get about 9 or 10 gallons at a time.
My tap water is pH 7.1 and EC 0.5.
I don't know why, but I can't grow healthy plants in coco with that tap water.
When mixing with RO water 1:3, all problems dissapeared.
My tap water is pH 7.1 and EC 0.5.
I don't know why, but I can't grow healthy plants in coco with that tap water.
When mixing with RO water 1:3, all problems dissapeared.
I had to make a switch to RO. Salt is the main issue. Plants would do fine till about week 5, then progressively get worse.
Something to think about when buying. For every 1 gallon of good water, our going to throw out a lot. Good units will go 1 to 1. 1 gallon good for 1 gallon waste. Most are 3to1. 3 waste to 1 good. So if water prices are high, Look into a better unit, it'll pay for itself in the long run.
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