Fish dying?

[W31Olds]

Post a full shot or two of your Tank. Do you have an Algae Problem and have added any type of treatment? Is the water a bit cloudy? When you changed Tanks what did you do about the sand?

 

[c.dickens9]

Sounds like ammonia to me. Years ago I killed a subadult Passer Angle. Cleaned a bunch of fuzzy algae off my rocks and glass and let the canister filter clean it up. Forgot to clean the canister filter and it turned into an ammonia factory. Even after a big water change the ammonia would jump right up again. Learned a valuable lesson and lost a beautiful fish in the process.

Does the HOB perform all your filtration (Mechanical, Chemical,Biological)? Maybe its just not up to the task - I would think its not enough for a 60 mixed. Have you cleaned the filter media lately? Maybe some or all of the bacteria were removed and your tank is going through a mini cycle. I believe its always best to have 2 or 3 types of biological filtration. Live rock, media, and even a prefilter (sponge, floss) will work part time.

Current parameters

 

[MnFish1]

Current parameters

Just remember that there are other toxins in tanks that are not measurable - I agree with the other poster - a pic of your full tank would be great as of today

 

[dont2930]

For the last week I’ve been dealing with my fish in my display tank just becoming extremely lethargic not eating and then laying on the ground. It’s a relatively new tank moved them from a 33 to a 60 about a month ago and they randomly are dropping like flies. Then when I move them into my 15 gallon cube that’s been running for a few months they fully recover and are fine but if I put them back in main tank they become lethargic don’t eat and are on the ground again. Also noticed my clown’s top fin is becoming translucent. Haven’t had any parameter swings and even changed my water a few days ago which throws me for a loop even more. I just run a HOB with media and activated carbon but any advice helps all my inverts and coral seem completely unaffected by whatever is happening.

I agree it may be oxygen in the lower levels of the tank but you may also have a bristleworm or several bothering the fish at night when the lights are off. Causing them stress and wearing them down. What is the temp of the water? 76 to 78 is good for clownfish. Good luck!

 

[c.dickens9]

Post a full shot or two of your Tank. Do you have an Algae Problem and have added any type of treatment? Is the water a bit cloudy? When you changed Tanks what did you do about the sand?

 

[W31Olds]

Since you transferred everything into a larger tank, was the sand also transferred? I would also remove and inspect the scraper and the magnets. You probably want at some point to add more rock. Are the items in the back right shells? Hard to tell. Also, are you adding a additives like Bacteria or something for Algae control?

 

[c.dickens9]

Since you transferred everything into a larger tank, was the sand also transferred? I would also remove and inspect the scraper and the magnets. You probably want at some point to add more rock. Are the items in the back right shells? Hard to tell. Also, are you adding a additives like Bacteria or something for Algae control?

I did transfer some of the sand yes, and yeah have some shells that I took from the beach a while back but they’ve been there since June so doubt they’re an issue. Bleached for a few hours and left in the sun for days

 

[c.dickens9]

Since you transferred everything into a larger tank, was the sand also transferred? I would also remove and inspect the scraper and the magnets. You probably want at some point to add more rock. Are the items in the back right shells? Hard to tell. Also, are you adding a additives like Bacteria or something for Algae control?

I did transfer some of the sand yes, and yeah have some shells that I took from the beach a while back but they’ve been there since June so doubt they’re an issue. Bleached for a few hours and left in the sun for days

Algae control I have a good pod population, 10+ turbo snails, bumblebee snails, sand sifting stars, nassareus snails emerald crabs etc

 

[W31Olds]

So no additives were added? I would suspect the sand. It seems to be a common problem when transferring to new Tanks. There are a lot of examples on this Forum where Members have had loses.

 

[ExSoldier]

Have you figured out what's going on? How's the situation?

 

[Michael Hughes]

Even though ammonia is registering as zero, shouldn't nitrite be zero in a fully cycled tank as well? The fact that some nitrite is showing up (even a small amount) makes me wonder if it could be going through a mini cycle again. Forgive me if you already mentioned this, but have you cleaned your filter media recently? Sometimes that will drop your beneficial bacteria population low enough to cause a miniature cycle.

Definitely following along as this is a bit of mystery...