Hey, I recently had a problem in my tank. It’s about 7 weeks old but it was going really well and I couldn’t really tell what had happened. All my corals were open but after i did a 20% water change they all closed up and none have opened back up since then. I thought it might be that one of parameters had dropped but they are as follows
Alk - 8.0
Mag - 1400
Calc - 420
Phosphate - 0.02
Nitrate - 12
Salinity - 1.026
Alongside that the water temperature of the water change was only 3 degreee different but I water change every week and nothing was wrong so I’m unsure of the problem. If anyone could let me know a reasoning that the corals may not be opening up that’s great. Most of them I brought back to my LFS since they weren’t doing well where they have opened up there but i kept a few hardier frags hoping they would do better.
I will show video before the water change, after the water change and present day
![E20A08D0-A065-4C3F-A7EB-0F13BB62934B.jpeg E20A08D0-A065-4C3F-A7EB-0F13BB62934B.jpeg](https://test.reef2reef.com/data/attachments/1956/1956765-65aefdb8df63d2b618f3ec3c2bc52df2.jpg)
Alk - 8.0
Mag - 1400
Calc - 420
Phosphate - 0.02
Nitrate - 12
Salinity - 1.026
Alongside that the water temperature of the water change was only 3 degreee different but I water change every week and nothing was wrong so I’m unsure of the problem. If anyone could let me know a reasoning that the corals may not be opening up that’s great. Most of them I brought back to my LFS since they weren’t doing well where they have opened up there but i kept a few hardier frags hoping they would do better.
I will show video before the water change, after the water change and present day
![E20A08D0-A065-4C3F-A7EB-0F13BB62934B.jpeg E20A08D0-A065-4C3F-A7EB-0F13BB62934B.jpeg](https://test.reef2reef.com/data/attachments/1956/1956765-65aefdb8df63d2b618f3ec3c2bc52df2.jpg)