yan402answered grow question 1mo ago Hey bro, your runoff pH creeping up while PPM drops usually means your medium is getting flushed a bit, nutrients are being pulled out faster than new ones are going in, especially if watering often with low EC.
If you’re using coco or peat, the buffering agents (like calcium/mag) may be depleted or unbalanced, leading to drift upward.
Make sure your input pH stays consistent 5.7–5.9 is fine in coco
Check EC of your runoff too. If it’s dropping fast, you might be underfeeding or overwatering.
Consider a light flush and rebalance with a full-strength feed if drift continues.
No panic yet, but watch for lockout signs if it keeps rising.