STN on Green Slimer

[Tek]

STN at the base of a small 3 branch colony. My test kits were off and my KH was at 12dKH for the past 2 months instead of 8dKH. CA was at 525 instead of 430ppm. I am slowly dropping the KH and CA with water changes. I have another frag of the same coral which is doing the opposite and is growing fast.

Should I frag it to stop the STN or wait for parameters to get in line? I have over 30 SPS in the tank and none of them are having issues. No pest visible or other corals near it.

 

[Alex T.]

STN at the base of a small 3 branch colony. My test kits were off and my KH was at 12dKH for the past 2 months instead of 8dKH. CA was at 525 instead of 430ppm. I am slowly dropping the KH and CA with water changes. I have another frag of the same coral which is doing the opposite and is growing fast.

Should I frag it to stop the STN or wait for parameters to get in line? I have over 30 SPS in the tank and none of them are having issues. No pest visible or other corals near it.

I'd probably frag it. Slowly dropping the kh is fine but if everything else looks good I would definitely do it slowly like you stated. Sometimes we shoot for magical numbers and wind up upsetting the balance of where the tank has naturally stabilized. If everything else looks good you could just chalk it up to being one of those things. Sometimes it just happens for no apparent reason.

 

[Tek]

I will go ahead and frag the slimer. My test kits will have backups from now on. Once a month test with the backup kit for a comparison or bring a sample to the LFS.