My corals are dying

[jc24]

I’ve been running this 17gallon nano tank for a year now. My corals have been growing and doing very well until last month, they suddenly shrink and not open fully. And I’m not sure what the things are on my back wall, I scrape them off and I would see it again the next day. I do water change weekly, which doesn’t seem to help. Xenia is the only coral that is growing normally. Not sure if my tank is too clean or too dirty at this point. And my snails died.

 

[kichimark]

Was there anything added or something different done right before you started noticing this about a month ago?

What are your parameters like?

 

[jc24]

Was there anything added or something different done right before you started noticing this about a month ago?

What are your parameters like?

I dosed ChemiClean to fight off some Cyano, but I did a water change after 2 days. Not sure if this is the cause. Temp and salinity are normal, the only other thing I tested is nitrate, which came out to be 0. I used the API test kit.

 

[kichimark]

I had to look that up since I am just jumping back into the hobby and never seen that product before.

Are you running any activated carbon by chance?

 

[jc24]

I had to look that up since I am just jumping back into the hobby and never seen that product before.

Are you running any activated carbon by chance?

Yes I’m running activated carbon.

 

[js-3Design]

0 nitrates and havent tested the rest. I think you should test the rest. And I think you will find your problems and solutions there.

 

[jc24]

0 nitrates and havent tested the rest. I think you should test the rest. And I think you will find your problems and solutions there.

Which test kit should I get? Phosphate?

 

[js-3Design]

test phosphates. and KH just to make sure.

chemiclean is an antibiotic that kills bacteria.. also a lot of the good bacteria and that is a problem.
I would test Po4, do a very large waterchange and bring no3 and p04 up to where you want it to be.

 

[jc24]

test phosphates. and KH just to make sure.

chemiclean is an antibiotic that kills bacteria.. also a lot of the good bacteria and that is a problem.
I would test Po4, do a very large waterchange and bring no3 and p04 up to where you want it to be.

Will do. Thank you

 

[reeffish]

Which test kit should I get? Phosphate?

Hanna Checkers