Too Much CA and MG?

[DHenderson]

Hi, friends. My 37 gallon with sump and has been setup and stable for 7 years. Over the past 6 month, though, I’ve lost every soft coral in the tank, all of which I’d grown since frags to beautiful specimens. Nothing fancy, but even “weeds” like Xenia and Cespitalaria, which I used to cull, all died. My Gorgonia and Green Toadstool Leather held on the longest. The Leather isn’t quite gone, but hasn’t opened in a couple months. The tank is filled with live rock and a good cleanup crew and just a couple small damsels.

Here are my parameters:
Ph 7.8-8.0

Temp 78-80

Ammonia 0

Nitrite 0

Nitrate 0

Phosphorus 0- .25

Calcium 600

Alkalinity 2.5 Meq/L or 7.0 dKH

Magnesium 1200

Flow is good. Lighting is from Reefbreeders.

Any advice is appreciated!

 

[DHenderson]

Hi, friends. My 37 gallon with sump and has been setup and stable for 7 years. Over the past 6 month, though, I’ve lost every soft coral in the tank, all of which I’d grown since frags to beautiful specimens. Nothing fancy, but even “weeds” like Xenia and Cespitalaria, which I used to cull, all died. My Gorgonia and Green Toadstool Leather held on the longest. The Leather isn’t quite gone, but hasn’t opened in a couple months. The tank is filled with live rock and a good cleanup crew and just a couple small damsels.

Here are my parameters:
Ph 7.8-8.0

Temp 78-80

Ammonia 0

Nitrite 0

Nitrate 0

Phosphorus 0- .25

Calcium 600

Alkalinity 2.5 Meq/L or 7.0 dKH

Magnesium 1200

Flow is good. Lighting is from Reefbreeders.

Any advice is appreciated!

Also, salinity is 1.025

 

[Randy Holmes-Farley Verified Community Expert]

Are you dosing anything?