Well, it's monday and we've had a "problem"....after recently installing a CO2 scrubber my PH was doing good. I recirculate it via the skimmer. Well, the skimmer got knocked over and started filling the CO2 media container full of water - now stop me if you've heard this before - but it immediately started dumping super high PH water into my sump. My APEX through an alarm for a PH of "9.8"....I kinda went HUH and thought it was a bad reading....now my tank is in the other room, I'm busy doing work stuff (my tank is in my office) and the APEX throws another one...."I BETTER LOOK AT THIS". Yeah, tank was completely white and all the coral were looking very weird....the tuxedo urchin was doing his best boogie nights impression. PANIC. So I shut down the sump, remove the CO2 media canister and setup the skimmer properly. I dump approx. 2 glugs of vinegar in and start changing water. SO FAR nothing has turned to mush. I think my DT is about 8.6 - 8.7 at this point. It's precip'in calcium like it's the blizzard of '93. What a mess. So yeah, when I thought "I should get a check valve for this CO2 scrubber line" I should have actually done it, along with "I should get a better stand for this skimmer". Wish me luck. Happy reefing!