I wrote about a week ago, that my SG was off. Up to 1.028, according to my LFS. They gave me some of their calibration fluid. I made up some water that day for a water change at night. I wake the next morning to see my corals look happier. I test the water and it reads 1.020...wth?? I recalibrate my refractometer with different fluid to 35 ppt and for the past few weeks I've been bringing my SG back up. Yesterday my SG was 1.023 and every coral looked really happy. Thinking I should really reach 1.026, I added just a little more saltwater to my sump last night. This morning my SG read, 1.023, almost 1.024, but now 2 of my acros don't look happy; neither extended their polyps today and the green one kinda browned out today. My yellow Aussie good torch wasn't happy either. So, do I drop my SG back to 1.023 or keep going till I reach 1.026? Tank: 75 mixed reef with 30 gal sump. TWV: close to 90 gals. CAL: 440 KH: 9 MG: 1290, I'm working on that SG: 1.024 Reef crystals salt mix Oh, I should add, all my fish seem to be doing really well. They are all very hungry and eat well. My false percula clowns laid eggs last Friday and you can see the fry growing. The female has really begun to pig out today, again. I assume she's making more eggs; her belly is getting round again. No snails have died due to this swing in SG. I have 3 snails and literary dozens if not hundreds of baby turbo snails everywhere. All are active at night. Thank you.