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HomegrownOhighO
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I do use silica tooPH what is going in. Id check the ppm of what is coming out, even organics it can build up too much. It never hurts to see the ph that is coming out. But I wouldn’t stress over that too much regardless the number. A lot people that have limestone or gypsum or another buffer in soil and nutrients believe it’s not necessary and don’t worry about their ph. However it can still be too low or high which is what causes those lockout issues when ph is under 5.5 or over 7. Also if you use silica and add it in the wrong order you can cause a nutrient deficiency that way.
Again, you are so far along none of this really matters in your situation and really your plant really looks nice especially with everything it’s thrown at you. But could do those checks and see what they say and just take it as a learning opportunity. Everything is likely in range but always a good idea to check it every now and then