10 fish dead in 3 days
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10 fish dead in 3 days

This is a discussion on 10 fish dead in 3 days within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> 75 gallon tank, checked nitrates nitrites ammonia and they are all fine and I see no signs of anything wrong. Had 5 cories die, ...

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10 fish dead in 3 days
Old 04-10-2011, 11:01 AM   #1
 
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10 fish dead in 3 days

75 gallon tank, checked nitrates nitrites ammonia and they are all fine and I see no signs of anything wrong.
Had 5 cories die, 3 emperor tetras, a betta, and a glowlight tetra just die. temp is at 78-79, its been running for months and havent had problems till now.

only recent changes were i added 4 kuhli loaches and a few cories, loaches are still alive and 3 of those cories are still alive.

No idea what to do.
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Old 04-10-2011, 11:06 AM   #2
 
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What the ????? That is really puzzling. Assuming there are no signs of injuries?

It would have to be something to do with the loaches since that's the only thing that changed. Right?

Off the top of my head I can't think of any disease that doesn't show SOME type of symptoms. I hope you figure it out soon and sorry about your fish loss :( :(
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Old 04-10-2011, 11:08 AM   #3
 
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No injuries, nothing. Its like they are having heart attacks.

At this rate the tank will be empty in a week, then Im getting rid of it.
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Old 04-10-2011, 11:14 AM   #4
 
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Quote:
Originally Posted by Grimmjow View Post
No injuries, nothing. Its like they are having heart attacks.

At this rate the tank will be empty in a week, then Im getting rid of it.
Awwwww ..... don't give up. Rehome the loaches and get back to rebuilding your community (after you figure out what happened).
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Old 04-10-2011, 12:47 PM   #5
 
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WOW, So weird to have one healthy fish drop out of the blue but ten. Just asking but what test kit would you be using. How is the aeration in the tank. Are the fish swimming at the top? Im just rambling off the top of my head about things that could be wrong. Anyone drop in a chemical on accident?

Only solution I can think of is get some more aeration, a different test kit and try a few water changes to possibly rid of something noxious that was dropped in or sprayed in there on accident.
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Old 04-10-2011, 04:32 PM   #6
 
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It can sometimes be difficult to find the cause of something like this. I went through very similar in 1996, so let's just examine everything until we find it.

What fish are in the tank (species and number)? Are there plants? Real wood or rock? What is the substrate? How often and what volume are water changes, and what conditioner? Any other products going in the tank?

Are you seeing any "different" behaviours from the long-term fish? Anything at all: it can be slightly less active (lethargy), faster respiration (corys especially often show this as the first sign of trouble), changes in eating/feeding habits... .

We'll start from here.

Byron.
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Old 04-11-2011, 07:27 AM   #7
 
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Quote:
Originally Posted by mcb5522 View Post
WOW, So weird to have one healthy fish drop out of the blue but ten. Just asking but what test kit would you be using. How is the aeration in the tank. Are the fish swimming at the top? Im just rambling off the top of my head about things that could be wrong. Anyone drop in a chemical on accident?

Only solution I can think of is get some more aeration, a different test kit and try a few water changes to possibly rid of something noxious that was dropped in or sprayed in there on accident.
I use that liquid test kit. None swimming near the top. Aeration should be fine, live plants and I have the spray bar pointed towards the surface. I dunno how anything could have gotten in, theres almost zero space where the intake and return tubes go in.


Quote:
Originally Posted by Byron View Post
It can sometimes be difficult to find the cause of something like this. I went through very similar in 1996, so let's just examine everything until we find it.

What fish are in the tank (species and number)? Are there plants? Real wood or rock? What is the substrate? How often and what volume are water changes, and what conditioner? Any other products going in the tank?

Are you seeing any "different" behaviours from the long-term fish? Anything at all: it can be slightly less active (lethargy), faster respiration (corys especially often show this as the first sign of trouble), changes in eating/feeding habits... .

We'll start from here.

Byron.
6 (possibly 7) kuhli loaches, about 12 glowlight tetras, 2 emperor tetras, 3 cories one is a julii dunno the other two, 2 swamp darters, and 1 german blue ram.

Real plants, real wood, real rock (lace rock, same as ive used in another tank for over a year).

I change 10 gallons every saturday and use Tetra aquasafe, same stuff Ive used for 2 years. Ive used some seachem plant food I think it was called but i havent added any in months.

I thought it may have been the cories I recently added but I checked them and their tankmates 3 different times over the course of maybe a week and a half for any signs of anything out of the ordinary.

I have been looking for the fast breathing and lethargy, I havent noticed any changes in behavior at all. Except for 1 thing.

The first thing I thought to do was check the cories cause I remember reading in the profile that they will like tip over or whatever. The one change in behavior I have noticed is the exact opposite of what I expected to see. Normally they would spend a good deal of their time either sitting around or searching the bigger plants or rocks for food, now that theres just the 3 left they spend probably 75% of their time swimming around as a gang and look much happier. But this didnt come as a shock to me as they act the opposite of how they should anyway like how you said in another thread how yours are shy but mine ignored my presence.
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Old 04-11-2011, 07:29 AM   #8
 
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Nothing different about eating either, and I feed them the same food i feed the other tanks.
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Old 04-11-2011, 09:17 AM   #9
 
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What are number's for ammonia ,nitrites,and nitrates?
Have heard some suggest that lace rock can alter water chemistry (increase hardness) which some fishes don't appreciate but I have not used it so can't confirm.Could test pH in a bucket of tapwater that has set overnight, and then place some of the rock in the bucket and test the pH again after it has set overnight.
Might also consider using a conditioner such as Prime that does the same thing your present conditioner does except it also detoxifies ammonia which may be present in your tapwater If tapwater contains chloramines. Chloramine is chlorine/ammonia, and many water conditioners only adress the chlorine portion of chloramines and leave the ammonia for bacteria to process.
Ten gallon water change each week is not all that much for 75 gallon and over time,the water can acidify (become softer)through bacterial breakdown of organics and if then, a large water change takes place with water that may be more alkaline(harder),fish become stressed by fluctuating chemistry.Same could happen if water in tank is more alkaline by possibly substrate composistion or rock decor, and then water change with softer water is performed.
I might wonder also about any accidental exposure from chemicals such as soaps, or cologne/perfume on hands, hair gels, or aerosols such as hair spray,deodorant's given the suddeness of the deaths.
I ,have killed fish by forgetting where my hands were just before placing them in the tank and have nearly repeated this on more than one occasion.
Were it me,I might consider performing 15 gal water changes each week for a couple weeks, and then 20 gal a week thereafter for 75 gal tank .
Might also see that foods have not reached expiration date and that they are in sealed container where nothing can come in contact with the food(rubbermaid dish).
would also see that buckets, nets,syphon,and any other tools used in your aquarium are kept away from those who might use them for other purposes.
Just some food for thought.Sudden deaths to me,,sound like something accidentally being introduced somehow but is only speculation on my part.
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Old 04-11-2011, 12:09 PM   #10
 
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Nothing jumps out at me. 1077 has some good suggestions. I have lace rock and have had it for 13 years now; the wood is more likely a suspect. The issue i had back in 1996 was due to a chunk of wood that leeched something toxic over time and the fish became very lethargic and died off over several weeks. Wood absorbs liquids, and that is always a possibility, though I am not suggesting it viable here.

Something coming in on the new fish; fish can often "carry" disease without themselves being affected. Which is why quarantining for several weeks is a benefit.

You mention ammonia, nitrites and nitrates being fine, but numbers would or might tell us something. Can you post the nitrates number? I'll assume ammonia and nitrite were zero, if not please mention those numbers too.

Any chance of something in your tap water suddenly? Water suppliers have been known to add this or that, sometimes without advance notice. Along the same lines, were any copper water pipes in your home recently replaced/repaired? Copper is deadly and this has caused similar conditions to what you described.

On the water, can you post the pH? And has either pH or nitrates changed at all recently?

Byron.
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