So, over the last week or so, several of my zoa colonies started to melt. I have changed nothing in this tank for 6 months - no new fish, no new corals - and everything was doing great - and growing like weeds....
then, my zoas started to look bad, and several colonies have almost completely disappeared.
I do 15% water changes every two weeks.
Current parameters:
Alk 8.3 (both Hannah and Apex)
Calcium 440
Mag 1390
Ph ranges from 8.2-8.4
Nitrates 10 (Hannah)
Phosphates .15 (Hannah)
salinity 35
temp 79-80
I do two part dosing - but nothing else. All the other corals look fine - Goni's, Torches, Hammers, Frogspawn, green slimer, green goblin, leather, birds nest. The zoas aren't near any other corals - just in their zoa garden.
I put some fresh carbon in this morning just in case.
I sent an ICP test off yesterday, but I imagine it will be a bit until I get it back.
The zoas are on rather big rocks - so not practical to take out and dip.
I haven't seen any fish picking on them, and last night after lights out, I took a look with a flashlight, and didn't see anything on them either.
Any ideas?
then, my zoas started to look bad, and several colonies have almost completely disappeared.
I do 15% water changes every two weeks.
Current parameters:
Alk 8.3 (both Hannah and Apex)
Calcium 440
Mag 1390
Ph ranges from 8.2-8.4
Nitrates 10 (Hannah)
Phosphates .15 (Hannah)
salinity 35
temp 79-80
I do two part dosing - but nothing else. All the other corals look fine - Goni's, Torches, Hammers, Frogspawn, green slimer, green goblin, leather, birds nest. The zoas aren't near any other corals - just in their zoa garden.
I put some fresh carbon in this morning just in case.
I sent an ICP test off yesterday, but I imagine it will be a bit until I get it back.
The zoas are on rather big rocks - so not practical to take out and dip.
I haven't seen any fish picking on them, and last night after lights out, I took a look with a flashlight, and didn't see anything on them either.
Any ideas?