Problem: Adding new fish to aquarium - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 03-05-2012, 02:52 PM Thread Starter
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Problem: Adding new fish to aquarium

Hi Folks

I have a 29g planted tank that's been running with pressurized co2 for about 4 months. The original fish that I have when i started the tank are all doing well. The problem is I tried to add neon tetras on 2 separate times and they have all died.

I do 2 drops per sec of co2 and the drop checker is a light green color during the day. No other ferts except root medic capsules in the substrate.

I acclimate the new fish in the tank for about 1 - 1.5 hours adding small amounts of water from the tank into the bag until it is almost full and than remove have the water and start the process again before adding to the tank.

Could it be the new fish are not used to the co2 in the tank? Maybe I should turn it off for a few days before adding new fish?

Thanks

-Jim

Last edited by PhilthyMcnasty; 03-05-2012 at 08:29 PM.
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post #2 of 10 (permalink) Old 03-05-2012, 03:01 PM
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That would be a first... Ph change maybe but again it would be a first. How many are you adding? Are they coming from the same batch from where you are getting them? If your other fish are fine then co2 is unlikely to be an issue and since only the new fish are dying I would look at the source first. Neons don't have the best reputation for being super hardy especially when buying from the big box stores. I'm gonna let others ask more questions to see if you can narrow down the possibilities. Good luck!

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post #3 of 10 (permalink) Old 03-05-2012, 03:13 PM Thread Starter
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About a month ago I had 6 neons and two plecos that were from Petsmart. The plecos lasted about a week and the neons about 3 days. I added 10 neons that I got from Petco this past Friday and they died mostly in 2 days. I asked them to feed them some food which they did and they all looked healthy and eating.

PH=6.7
Ammonia = 0
Nitrite = 0
Nitrate = 15
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post #4 of 10 (permalink) Old 03-05-2012, 04:38 PM
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Quote:
Originally Posted by PhilthyMcnasty View Post
About a month ago I had 6 neons and two plecos that were from Petsmart. The plecos lasted about a week and the neons about 3 days. I added 10 neons that I got from Petco this past Friday and they died mostly in 2 days. I asked them to feed them some food which they did and they all looked healthy and eating.

PH=6.7
Ammonia = 0
Nitrite = 0
Nitrate = 15

I am wondering the same thing about adding fish. Now mind you, I'm not speaking from experience - just thinking out loud if you will.

Aclimating fish to a new environment is stessful. The fish are stressed from being shipped to the lfs, then put into a baggie and bounced around in the car, then add different water and temperature to the baggie and you have fish with some serious gray hair. Now, stick them in a tank with high co2 levels and it is probably enough to push them over the proverbial edge. The fish currently habitating in the tank are accustomed to the existing co2 levels and are otherwise in good shape. IMO, its probably the co2.

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post #5 of 10 (permalink) Old 03-05-2012, 05:20 PM
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Quote:
Originally Posted by PhilthyMcnasty View Post
Hi Folks

I have a 29g planted tank that been running with presurrized co2 for about 4 months. The original fish that I have when i started the tank are all doing well. The problem is I tried to add neon tetras on 2 separate times and they have all died.

I do 2 drops of co2 and the drop checker is a light green color during the day. No other fert except root media capsules in the substrate.

I accumate the new fish in the tank for about 1 - 1.5 hours adding small amounts of water from the tank into the bag until it is almost full and than remove have the water and start the proces again before adding to the tank.

Could it be the new fish are not used to the co2 in the tank? Maybe I should turn it off for a few days before adding new fish?

Thanks

-Jim
This is actually not uncommon - I have to deal with the same situation.
In addition to doing acclimatization, I turn off co2 and run a bubble wand/airstone to deplete the tank water of co2. After I add the fish to the tank, I start raising co2 levels very slow over several days.

If the co2 level is pretty high, you will see the new fish go into distress almost immediately.

Good luck.
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post #6 of 10 (permalink) Old 03-05-2012, 05:27 PM
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i feel that this is more based on the stregnth of the genetics of the fish the big stores use cheap broodstock which will only result in weak offspring try a reputable breeder maybe
??

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post #7 of 10 (permalink) Old 03-05-2012, 05:52 PM
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Stores add stock all the time (at least once a week) and you risk all your current fish everytime new things are added to the tank. Big box stores can be the worst.

Quarantine first then add the survivors to you're system.


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post #8 of 10 (permalink) Old 03-05-2012, 05:57 PM
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Originally Posted by OVT View Post
This is actually not uncommon - I have to deal with the same situation.
In addition to doing acclimatization, I turn off co2 and run a bubble wand/airstone to deplete the tank water of co2. After I add the fish to the tank, I start raising co2 levels very slow over several days.

If the co2 level is pretty high, you will see the new fish go into distress almost immediately.

Good luck.
OVT has it spot on right here. If your using CO2 then you should be doing this for new inhabitants that your adding to the tank. I follow this very procedure he stated when adding any new livestock.

If you don't you can expect to lose fish. Just my experience.

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post #9 of 10 (permalink) Old 03-05-2012, 06:00 PM
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All the stresses of acclimation as suggested above can certainly happen, also if the fish have any low level infection the stresses can make it worse so they can die of whatever they are infected with. The worst part of these stresses is water with higher or lower mineral and salt level than they are accustomed to.

Test the GH, KH and TDS in the bag. Even better, go to the store ahead of time and test it in their tanks. Explain that you have had problems acclimating the fish and you are setting up a quarantine tank.

Set up a quarantine tank that matches those parameters.
When you know you will buy fish within 24 hours add some cycled media to the filter, and some plant cuttings. Let the plants drift in the tank.

When you bring the fish home acclimate them to the Q-tank. This should be really easy, it is very similar to the water they were in at the store. However, to make it even easier on them you can drip acclimate if you feel you need to.

While the fish are in quarantine watch for diseases and parasites. If they need any medication, do so.
Also, gradually change the water chemistry in the Q-tank until it matches your display tank. Most important: I make the TDS match the store water by starting with the GH & KH. One store near me adds salt, so I do too, when I buy from that store. Over the quarantine time many water changes lower the water hardness, and remove the salt. The fishes bodies change to be able to deal with the changing levels of minerals and salt. It takes a while for them to change like that, it cannot happen in just an hour or two.
Time in quarantine will be at least 1 month past the time that any medications were used.
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post #10 of 10 (permalink) Old 03-06-2012, 08:24 PM Thread Starter
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Thanks for all the advice. I had a feeling it might be the co2 in the tank but wasn't 100% sure. I'll need to get a cheap 10g tank to use as a quarantine tank at some point, just really don't have the room right now.
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