sps dying

[krlvin5792]

Hi guys can anyone know why sps start dying from the tip after one week introduce to the tank ? Alk10 , no3 16.8 po4 0.11 . My tank already had two years but can’t even keep any sps corals , I also have a big leather corals growing like crazy . I already send the water to icp lab and check , every parameter was fine . I run calcium reactor , carbon . Water change once a month 20 gal water volume. Light running 4 radions AB MODE .

 

[bonomo53]

With your alk that high any swings added with low nutrients will cause stn/rtn. I would aim for a lower alk 7-8dkh. Bring it down slowly over time.