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I have been seeing contradictory PH information charts for hydroponics systems... What is the recommended range for Ca?

isnt Ca only available up to PH 5.8 in hydroponics?

According to this PH chart if I stick to that PH range I will be locked for Ca..which may be actually the plants problem...

What is the best PH chart for Hydroponics?

information seems contradictory regarding the nutrient availability.. this graphs shows totally different ranges...

In Hydroponic systems Ca is only available over PH 6.5 according to that graph.. if my plant has Ca deficiency how will I correct it with Ph 5.9 / 6.1?

I dont have PPM better yet. I have started with vey low nutrients as you ca read on the post. Roots are very healthy and growing long.

Ok. It has been mostly on the upper range (like 6.1 to 6.4) which from what I see might lead to deficiency on Ca and Mag intake..

Im using all three Micro, Grow and Bloom

I was already o the 50% recommended dose...so I don't change anything but keep eye on PH?

I added recommended dosage of GH Calcium/magnesium

How can it be with such low concentration of nutrients? I have keep the same water for over 10 days already ad PH has bee 5.5 to 6.4

PH has been between 5.5 ad 6.4... the water level must be about 1cm from bottom of pot and I use Mars 1000 TS ligth o a 18/24h schedule

Its my first grow of a Auto indica strain and I'm currently on my second week. Im using Hydroponics DWC on a 5 gal bucket and using tap water with Flora Trio 2 ml /gal (0,5 ml / L) for each and Calcium /Magnesium 4ml/gal from GE. Temp is set around 21/25C and moisture around 50%. I noticed...