Not all is going well currently
, but i guess that's reefing....
Dropped AlK slowly in an effort to reduce precipitation in wave makers. Seems as though this has done the trick. Not sure if it was related but ALK and Calc demand dropped to near zero shortly after while mag continued to be taken up at previous rate.
Lost a one large SPS colony that RTN'd over night a month or so ago, added some carbon in the sump to take out any nasties from the decaying coral tissue. Nothing else seemed unhappy at the time. I was seeing excellent growth rates and getting some nice colouration of other SPS.
I carried out some maintenance on the light fixture and when re hanging it i inadvertently reinstalled it 80mm lower. Unfortunately this was just before i went away for four days. When i returned there were about 6 colonies with burnt tips and several colonies that had shed tissue around the bases. There was no clear pattern to which corals were effected, some were in high positions, others were close to the sand bed. Checked all parameters and nothing was obviously out of whack compared to where it had been running. Took me a few days to realise the difference in light height before i lifted it back up. The affected SPS have browned out, with some showing complete die off of some branches. A pagoda had shed tissue on the upper most edge, this has now shed all tissue over the last day or two.
Interestingly there are still a lot of pieces that are not showing any symptoms of struggle. I am not convinced the change in light was the only factor but believe it probably was the catalyst.
Anyway, i will keep up with water changes and closely monitor parameters in the hope that colonies recover, or at worst, further colonies are not affected.
Col
