Rectracted after WC

[Kianou]

Please help I change my water yesterday for 30% and now all my coral eh retracted and not happy. I have two torches, one Duncan, one frogspawn and two hammer corals, and few softies. This is the first time that they did this after water change

20g tank
Kh 9.5
Cal 400
Mag 1400
Salinity 1.025
Nitrates 5
Phos 0.05

my tank is 9months old, and I'm just scared beacuse i spent a lot in my tank and corals already and in just one mistake they'll end up dying.

 

[eggie]

Have you always used the same salt brand ?

 

[Kianou]

Have you always used the same salt brand ?

yes. is my corals dying? I found out i read .03 tds in my rodi water maybe thats one of the reason.