ATO went haywire and SG went from .025 to .015

[Toast]

Hey all. I have a 10 gallon reef tank with LPS corals and a neon cleaner goby. I have a useek nano ATO, which was doing great until yesterday/today. I noticed some coral dieoff, tested all normal params, and they were good. Tested salinity and it was at .015sg. Checked usage on it and noticed that it had added WAY more water than it should've. I assume the best course of action is to bring up the salt content of the tank over the next day or so by slowly adding premixed saltwater? My neon cleaner goby is doing mostly fine somehow... Lost a blastomussa that was already dying from a previous stress event

 

[Doctorgori]

totally recoverable, not blowing smoke but my money is you will be ok …
IME “slowly” ain’t that slow….24hrs from 15 to 35 is doable without stress/shock ….
Disclaimer:I’m no biologist but going “up” in salinity is trickier than going down …but you got enough play in 24hr to get the salinity back to normal

 

[Toast]

totally recoverable, not blowing smoke but my money is you will be ok …
IME “slowly” ain’t that slow….24hrs from 15 to 35 is doable without stress/shock ….
Disclaimer:I’m no biologist but going “up” in salinity is trickier than going down …but you got enough play in 24hr to get the salinity back to normal

Hey man I went to bed at 4am adjusting it very slowly, got up this morning and everything is dead except my zoas lol *** literally over 20 corals dead this week. Last weekend was because my FIL overfed and didnt top off when i was on vacation.. yesterday because of an ATO malfunction. Salinity is now 1.021-1.022 idk what to do today since so many are dead. I've been gradually adding a tablespoon of salt