Did some reading of abstracts on the effect of ammonia on Atlantic salmon postsmolts (0.6-0.7 kg).
Sublethal effects and safe levels of ammonia in seawater for Atlantic salmon postsmolts (Salmo salar L.). | Fivelstad, S., Schwarz, J., Strmsnes, H., Olsen, A. B. | Aquacultural Engineering |
It seems as if there wasn't much of an effect on them.
Using 1-2 oz of household ammonia (10%) would only raise the concentration of 20 gal. of water where they saw a non-lethal change in the fish. In 100 gal. there wasn't any significant change.
1 to 2 oz of household ammonia would double the concentation of ammonia in 4,000 to 5,000 gal of seawater.
It took a bit of time to do the math. This is the worst case senario assuming none of the ammonia was used up, etc. I think it's safe
But then there is the coral. Who knows? Maybe it will like it.