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Since I started this thread almost 2 years ago I have received many queries about the hydroponic store. Latest update is, it does not exist yet. The primary reason being practicing hydroponics commercially or domestically on imported nutrients is a guaranteed money losing venture. Hence running...

I tested two water samples from Chennai. One sample was from a bore (tube) well and another from the city water supply (known as Metro water in Chennai). As expected the bore water was very hard about 1.21mS. and the city water had a tolerable hardness of 0.50mS. Even with a lower hardness the...