- Joined
- Nov 5, 2024
- Messages
- 75
- Reaction score
- 102
- Location
- South Australia
- What state or country do you live in
- Australia
Hey Reefers,
I finished cycling my tank a few weeks back and I added 2 clowns and 3 nassarius snails post cycle. I waited nearly 3 weeks and the ugly phase was in full effect. I then added a lawnmower blenny, 3 astraea snails and 2 sand shifting starfish.
All was going well and tank is looking much cleaner now but a few days after adding the new livestock, I’ve had an ammonia spike which has peaked at about 1.0ppm. I thought this was from the additions, but I believe it’s user error now as I noticed dKH was down about 6.8 a few days ago so I dosed to KH Coralline Gro to boost it up. Instructions required 34ml and I stupidly dosed the full amount into the sump all at once. I’m now certain that the dKH spike caused stress to the livestock, resulting in the ammonia spike.
I’ve managed to pull out two of the nassarius snails and they both look very ill. Mucus coming from their body as seen in attached image. Can’t find the third one still.
Ammonia is still sitting around 0.75ppm a few days later, I’ve done a decent 25-30% water change. The remainder of the livestock is hanging in there, but I’m concerned about how long they can endure this spike.
I’ve learnt my lesson from this mistake, which is the silver lining. But I guess I’m seeking feedback on where to from here.
- How long can I expect the ammonia spike to last?
- Is there anything else I should/could be doing to try keep my livestock alive and lower the ammonia?
- Shall I assume the nassarius snails are done for?
- Any other feedback/thoughts?
Last thought, through research, I discovered that the ammonia from the API test kits is total ammonia. Using calculations to determine the NH3/NH4 ratio, my NH3 is sitting right on the cusp of dangerous (0.052), hence why my little guys might be hanging in there to this point.
Thanks in advance for your thoughts.

I finished cycling my tank a few weeks back and I added 2 clowns and 3 nassarius snails post cycle. I waited nearly 3 weeks and the ugly phase was in full effect. I then added a lawnmower blenny, 3 astraea snails and 2 sand shifting starfish.
All was going well and tank is looking much cleaner now but a few days after adding the new livestock, I’ve had an ammonia spike which has peaked at about 1.0ppm. I thought this was from the additions, but I believe it’s user error now as I noticed dKH was down about 6.8 a few days ago so I dosed to KH Coralline Gro to boost it up. Instructions required 34ml and I stupidly dosed the full amount into the sump all at once. I’m now certain that the dKH spike caused stress to the livestock, resulting in the ammonia spike.
I’ve managed to pull out two of the nassarius snails and they both look very ill. Mucus coming from their body as seen in attached image. Can’t find the third one still.
Ammonia is still sitting around 0.75ppm a few days later, I’ve done a decent 25-30% water change. The remainder of the livestock is hanging in there, but I’m concerned about how long they can endure this spike.
I’ve learnt my lesson from this mistake, which is the silver lining. But I guess I’m seeking feedback on where to from here.
- How long can I expect the ammonia spike to last?
- Is there anything else I should/could be doing to try keep my livestock alive and lower the ammonia?
- Shall I assume the nassarius snails are done for?
- Any other feedback/thoughts?
Last thought, through research, I discovered that the ammonia from the API test kits is total ammonia. Using calculations to determine the NH3/NH4 ratio, my NH3 is sitting right on the cusp of dangerous (0.052), hence why my little guys might be hanging in there to this point.
Thanks in advance for your thoughts.

