Why the hell do my sps keep dying

[Red Coral Aquariums]

The only things that jump out at me on your parameters is the low salinity (I would recommend 1.025 or 26 and due to the fact you have not tested for Mag. Here is an article that might help.
http://reefkeeping.com/issues/2006-07/rhf/index.php
Kevin

[Skimmerking]

Originally Posted by Red Coral Aquariums

The only things that jump out at me on your parameters is the low salinity (I would recommend 1.025 or 26 and due to the fact you have not tested for Mag. Here is an article that might help.
http://reefkeeping.com/issues/2006-07/rhf/index.php
Kevin

Kevin I disagree with the low salt in the water, I know of some
pepole that have a 1.22 tank and their SPS is awesome, I keep mine at 1.023 and i have no problems keeping SPS. if your MAg is really low then that could be the problem , but if you are doing water changes every 3 weeks then you are probably getting enough Magnesium. unless you are dosing KALK at a high rate which would cause the Magnesuim to drop

[justinl]

Originally Posted by asmodeus

Kevin I disagree with the low salt in the water, I know of some
pepole that have a 1.22 tank and their SPS is awesome, I keep mine at 1.023 and i have no problems keeping SPS. if your MAg is really low then that could be the problem , but if you are doing water changes every 3 weeks then you are probably getting enough Magnesium. unless you are dosing KALK at a high rate which would cause the Magnesuim to drop

Not disagreeing with low salinity tanks, Ive seen them too, but it would explain the short time before the OP's sps all died. I can almost guarantee wherever he gets his corals from, the tanks there are not kept at 1.022; most lfs keep their tanks at the same salinity most reefers target: 1.025 (give or take a bit). the rapid jump to 1.022 is enough to kill a coral imo. I also have to aske how it was measured; hydrometer? refractometer? calibrated or not for either?

[Canadian]

Originally Posted by justinl

Not disagreeing with low salinity tanks, Ive seen them too, but it would explain the short time before the OP's sps all died. I can almost guarantee wherever he gets his corals from, the tanks there are not kept at 1.022; most lfs keep their tanks at the same salinity most reefers target: 1.025 (give or take a bit). the rapid jump to 1.022 is enough to kill a coral imo. I also have to aske how it was measured; hydrometer? refractometer? calibrated or not for either?

+1

The SG of 1.022 jumped out at me. I'd venture to guess that SG was derived using a hydrometer which would make the reported value more spurious. And if the only flow you have in a 75g tank is 2 Koralia 1's and a Koralia Nano then you have really insufficient flow for SPS.

dabandit,

I'd suggest you take some time to be more specific when reporting the details of your tank (i.e. what test kits are you using to come up with your reported parameters) and to post a picture of your tank. A bunch of reported parameters often doesn't provide as much information as a picture can. If you have hair algae growing for your tang then you can guarantee you don't have 0 phosphate and you likely don't have 0 nitrate.

Also, how long has the tank been set up and how long has the DSB been set up?

[Skimmerking]

Originally Posted by justinl

Not disagreeing with low salinity tanks, Ive seen them too, but it would explain the short time before the OP's sps all died. I can almost guarantee wherever he gets his corals from, the tanks there are not kept at 1.022; most lfs keep their tanks at the same salinity most reefers target: 1.025 (give or take a bit). the rapid jump to 1.022 is enough to kill a coral imo. I also have to aske how it was measured; hydrometer? refractometer? calibrated or not for either?

Actually Justin one of the bigger places in the City I won't name his place, only for and not bashing his store. He keeps his tanks at 1.021 Doug can jump in on this one. I know all the time that I would get home and test the water I keep mine at 1.025 as most of us will ,but he will always say, after 3 of us will test of refractormeter ours are wrong and his is right. So you think lot s of LFS would do the proper thing but any thing to save a few bucks in salt.. ya Inreference to you stating the big jump in Salinity I always check the bag before addding any water in the bag I trust no one...