recovering from magnesium deficiency

borman

Prolific Poster
Dec 29, 2007
58
0
6
44
Zaporozhye, Ukraine
hello
Month ago i start adding RO water. From the start Gh was 15 i add 3 times (once time per week )by 100 liter of pure RO. Now i have gh 7 and calcium gh 5 so actually magnesium concentration must be around 6 mg.l . Also i find strong indication of magnesium deficiency. I add magnesium sulfate so +4.6 mg l. Please give me advice what optimal concentration of magnesium, and how fast plant will recover from deficiency.
Thanks