hello all, I'm new to this site so please be easy on me lol. I've been in the hobby for about 8 years now. I recently started my 10gallon Nano tank (3 months ago) its doing average I would say. the corals are growing, not fast but pretty well. I don't have much coralline algae growing so I wanted to try purple up. well I did that last night with a ph of about 8.14 and I woke up to a ton of notifications from my APEX saying it was 6.0!! I'm planning on doing a water change immediately but curious to why it dropped so much. I have a 10 gallon sump/refugium too so my water volume is around 18 gallons with all my live rock and sand.