Ro is a process of sending water thru a filter, then forcing it back thru a membrane to remove all the impurities and minerals, and salts. some are harmful to your photosynthesis, some are not. you have to remove both, in order to get pure water.Quote:
Originally Posted by postmandave
the thing is when you use RO, you must replenish your pure water with the necessary base minerals you removed.
For this Botanicare's Calmag+ is the preferred product.
Now you have healthy water, full of minerals (botanicare is organic), and you are ready to add nutes and additives to enhance your production rate.
some well water is perfect for growing(you must test your well water), for instance; My well water is high is iron...167ppm's. so, I remove it.
your ph will balance easier, almost by itself with the application of a proven pro nutrient line (most nutes come with a buffer to self adjust the ph for you), at least close to within range.
the only drawback that I see, is the fact that you have to put calcium, magnesium back in...and to me having the perfect blend of calmag/minerals is...PRICELESS.
let me know if this answers your Q lw