Why the hell do my sps keep dying

[dabandit]

Im stumped I've tried on and off to keep sps for about 2 years allways the same result but only in this system,could it be parasite or bacteria? and what can I do?
P.s no cyano i system but some hair algae on back wall for tang

[fencer]

Check your REDOX potential

[martym]

Alk at 10 is way to high with the zeo system. 8 is the highest it should be.

[justinl]

how old is the system? I admit I am not familiar with zeo, so here's me dropping out of the conversation

[michika]

SG of 1.022? How was it measured?

[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?

[o.c.d.]

when you are adding the corals are you starting low in the tank? how about the age of the bulbs?