pH swing / Glofish dropping daily
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pH swing / Glofish dropping daily

This is a discussion on pH swing / Glofish dropping daily within the Tropical Fish Diseases forums, part of the Freshwater Fish and Aquariums category; --> Let me start off with a little background... I had 9 glofish (danio), some corys, a bolivian and a blue ram in my 20gal ...

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pH swing / Glofish dropping daily
Old 09-05-2013, 10:08 AM   #1
 
pH swing / Glofish dropping daily

Let me start off with a little background...

I had 9 glofish (danio), some corys, a bolivian and a blue ram in my 20gal long tank.
I have had my glofish and corys since January (8 months) and have never had one die. They went through 3 tank changes and were my starter fish, so these were extremely hardy fish. I've had my rams for about 2 months.

It had been about 2 months since my last filter change, so last weekend I replaced the filter and did about a 33% water change. I keep my pH at 7. When I replaced the water, I put way too much acid buffer in and didn't test it. Well the next day my bolivian ram started looking very sick and I panicked. I went to the LFS and tested my water. They told me my pH was off the charts low (some where around 5). The weird thing was no other fish seemed sick.

So I rushed home and added a scoop of Alkaline buffer to raise the pH. Keep in mind the only sick fish was the Bolivian at the time. As soon as I added the Alkaline, all the glo fish shot to the top and were in the corner of the tank gasping for air. My pH was only raised to about 6.4, so it wasn't too big of a jump. I now have a test kit and have tested twice a day.

My first question is why did the glofish shoot to the top and have trouble breathing from the Alkaline buffer?

Over the next few days I did about 20% water changes until I got the pH to its current level of 6.8. I have had 5 glo fish die, one every day since Sunday, and two more are sick.

The weirdest thing is two of the glo fish never went to the top and gasped for air. They acted like nothing has changed and are completely healthy. Also, the bolivian got healthy as soon as I fixed the pH. It blows my mind the bolivian and blue ram have been thriving through this all, while my hardy glo fish are dropping daily.

Why did this kill all of my glo fish? The only thing I can think of is they can't live in the acidic water of below 7 pH since they have been at or above 7 their whole life???

Any help is appreciated.

* Also, when I changed the filter I only replaced the white pad and put new carbon in it. I didn't clean the sponge or the inside of the filter. It is a Top Fin 30 rated power filter.
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Old 09-05-2013, 11:27 AM   #2
 
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Quote:
Originally Posted by HallaDurg View Post
Let me start off with a little background...

I had 9 glofish (danio), some corys, a bolivian and a blue ram in my 20gal long tank.
I have had my glofish and corys since January (8 months) and have never had one die. They went through 3 tank changes and were my starter fish, so these were extremely hardy fish. I've had my rams for about 2 months.

It had been about 2 months since my last filter change, so last weekend I replaced the filter and did about a 33% water change. I keep my pH at 7. When I replaced the water, I put way too much acid buffer in and didn't test it. Well the next day my bolivian ram started looking very sick and I panicked. I went to the LFS and tested my water. They told me my pH was off the charts low (some where around 5). The weird thing was no other fish seemed sick.

So I rushed home and added a scoop of Alkaline buffer to raise the pH. Keep in mind the only sick fish was the Bolivian at the time. As soon as I added the Alkaline, all the glo fish shot to the top and were in the corner of the tank gasping for air. My pH was only raised to about 6.4, so it wasn't too big of a jump. I now have a test kit and have tested twice a day.

My first question is why did the glofish shoot to the top and have trouble breathing from the Alkaline buffer?

Over the next few days I did about 20% water changes until I got the pH to its current level of 6.8. I have had 5 glo fish die, one every day since Sunday, and two more are sick.

The weirdest thing is two of the glo fish never went to the top and gasped for air. They acted like nothing has changed and are completely healthy. Also, the bolivian got healthy as soon as I fixed the pH. It blows my mind the bolivian and blue ram have been thriving through this all, while my hardy glo fish are dropping daily.

Why did this kill all of my glo fish? The only thing I can think of is they can't live in the acidic water of below 7 pH since they have been at or above 7 their whole life???

Any help is appreciated.

* Also, when I changed the filter I only replaced the white pad and put new carbon in it. I didn't clean the sponge or the inside of the filter. It is a Top Fin 30 rated power filter.
Sudden change in pH is hard on fish such as what happened with first too much acid buffer,,and then with alkaline buffer to raise the pH back up.
Unless your tapwater is below 6.0 for pH or above 8.0 for pH you and your fish would do better with using the tapwater and dechlorinator only during weekly water changes.Most fish will adapt to water that fall's between the number's mentioned for pH.
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Old 09-05-2013, 12:12 PM   #3
 
Unfortunately my tap pH is somewhere greater than 8 so I do add a little acid buffer every time, this time I went over board. I suppose this is a learning experience, and now have all the necessary testing kits to prevent this.

One last question, is the difference between 7.2 and 6.8 serious on fish? I know one is considered acidic and the other basic, so does it completely affect the water chemistry that the fish are living in? For example if the fish have been living in 7-7.2 their whole life, and now it's 6.8 is that a drastic difference since it's on the other side?
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Old 09-05-2013, 12:49 PM   #4
 
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Originally Posted by HallaDurg View Post
Unfortunately my tap pH is somewhere greater than 8 so I do add a little acid buffer every time, this time I went over board. I suppose this is a learning experience, and now have all the necessary testing kits to prevent this.

One last question, is the difference between 7.2 and 6.8 serious on fish? I know one is considered acidic and the other basic, so does it completely affect the water chemistry that the fish are living in? For example if the fish have been living in 7-7.2 their whole life, and now it's 6.8 is that a drastic difference since it's on the other side?
Depend's on how fast it happens. 6.8 to 7.2 is close to ten times more alkaline and if it happen's too quickly,,the sudden change from more acidic to more alkaline has negative effect on osmoregulatory function's of the fish.
Is not the pH the fish feel,but the change in hardness GH,KH,that they struggle with when it happen's quickly.
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