burnt tips

Just came back from a 2 week work trip, got some SPS that have been in my tank for 6 months that suddenly have burnt tips and some that have partially STN. Immediately ran tests but nothing standing out to me that would cause this. Trident has maintained alk, cal and mag pretty steady the...

40 gallons Tank params: KH: 8~9 Ca: 410~420 Mg: 1350~1380 NO3: 1 PO4: Undetectable I regularly feed Tropical Marin's powder coral food about once in two days, with almost daily input of amino acids. I feed my 7 fish twice a day. People say that burnt tips occur when high alk...

several sps have burnt tip, am I dealing with dino? water parameter (1 year old tank): ====================== nitrate:10 phosphate: 0.06 Alkalinity: 8.6 Calcium: 475 Magnesium: 1455 ====================== what have changed recently: About a month ago, both nitrate and phosphate in my tank is...

So I've been fighting with some burnt tips/STN on my SPS with the following parameters: Alk - 8.1 Calcium - 450 Phosphate - .1 Nitrate - 10 Mag - 1400 I understand that low nutrients of near 0 can cause burnt tips/STN in SPS, but I would have never thought that the levels posted above were...