Semi-Hydro and pH adjustment
Hello everyone,
My entire collection of orchids are in semi-hydroponics which are on heat mats and under LED lights. I find that my after pouring my 5.8 nutrient solution on my orchids in leca (I'm super meticulous about the pH), that the pH raises after an hour or so. The pH can fall low or high depending on the plant. Certain plants pH also falls faster or lower depending on the plant as well. If I have time on that particular day, I put the pH back in the range I want it at, which is at a pH of 5.8 using pH up or down.
My question is for days I am busy or on vacation, how can I prevent the pH from falling or going up from that range? Is pH adjustment inevitable due to orchid absorption of the nutrient in the semi-hydroponic solution?
Some suggestions on what I can use or do, or why this happens would be honestly great!
Thank you!
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