tobh
Supporter
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i too use power si bloom and haven't noticed any major nosedive in pH. I was mildly concerned at first as i was using protekt before and that added a ton of alkalinity to the solution and required pH'ing back to 6.5 before mixing everything else. not the case with power si, which i really like. i'd suspect it was caused by another additive. one option you could consider is adding pH up initially, bring back to 6.5 then proceed mixing all your nutrients with si first, then the rest in proper order and mixing duration between parts. could also confirm it's the si causing the nosedive by checking the ph before throwing everything else in, and proceeding to check throughout mixing a new res until you find the culprit. process of elimination basically.