Came home the other day from work to a milky tank.Seems the rag that i had stuffed on the top of my HOT overflow to help silence it managed to slip down into the drain.It clogged,my kalk auto-top-off compensated by dumping 3 gallons of limewater into my system(not to mention,all the water on the rug).Lets see,that would make it the 3rd time i've had this happen.You think i'd of learned by now.I know my PH must have been thru the roof(never tested) but after things were clear enough to view the corals,to my surprise they all had polyps extended and seem unaffected.The only negative is all the calc that precipitated had left a white dust over everything.So i added some salt to get my salinity back up and all seems normal.I knew calcium precipitated but was surprised today when i tested my alk and it was only 7dKH.I normally keep it at 9.I swear,every time i start to get a growth spurt out of my acro's,I have to go ruin it with a stupid mistake.Another lesson learned,I guess.