I pulled a dumb rookie mistake. I have been zip tying my filter sock to my drain pipe in the sump. Will I got a little busy this week and did not get a chance to change it out like I normally do every other day. It got clogged enough that it did not let the water flow through it and since it tied straight onto the drain it did not let the overflow drain so my pump kept pump the water from the sump into the display but the water was not going back to the sump. My wife woke me up at 3am telling me my display was overflowing. If I didn't have the ATO it would of just made the tank really full but with the sump being emptied into the display the ATO kept try to fill sump there was only about 2 and half gallon in the reservoir just enough to overflow the tank and drop my Salinity to 1.023. I drain some of the water and added half gallon of high salinity water. Will check again in the morning might do it again.