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Author Topic: goldfish with white like coating on them  (Read 3098 times)
leviathan
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goldfish with white like coating on them
« on: August 29, 2010, 07:41:06 PM »

My goldfish in my outdoor pond (4900 litres) have started to get a white film on their bodies and the smallers ones are on top of pond not doing well at all. i have tested water and it's PH is high. I have a large filter system and the water is very clear. There is a mixture of koi and goldfish in the pond. Some of the big fantails have a bit of fraying on their fins as well. Can anybody offer any help.
thank you.
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Hanna
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Re: goldfish with white like coating on them
« Reply #1 on: August 29, 2010, 08:20:47 PM »

Clear water doesn't mean that the water chemistry is OK.
Did you test for Ammonia, Nitrite, Nitrates too/
How many fish in the pond?

Fraying fins means fin rot.
Fish at the surface means lack of oxygen in the water/ too high CO2 levels? to high temperature
Milky cloudiness on skin can be caused by Costia, Chilodonella. You may need antibiotics to treat. And quarantine the sick fish.
Or you may need to treat the whole pond if every fish is already infected. Keep a close eye on all your fishes.

Definitely sth wrong with your water. Sth caused the sudden rise of pH. Btw HOW high is it ? Can you provide us with exact results?
No doubt that you will need to do a bigger waterchange, and look for the cause.
Check your filter system. Add an air pump. Get the temperature down but slowly.

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leviathan
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Re: goldfish with white like coating on them
« Reply #2 on: August 29, 2010, 09:03:02 PM »

I did check for nitrates and that test was clear, i live in temperate climate so not very cold here. i have about 50 fish all sizes in pond and a lot of water lilies as well but of course they are not growing at moment as we are coming off winter. i am going to petshop today to get an antibiotic and dose the pond. i don't know know exact ph as I just tested it against the card that was in the kit and it was in the blue. i am just an amatuer at this, have had the pond 3 years and have not had a problem before. we have had a lot of rain recently and i have not done a water change recently. should i do one now? I also noticed 1 of the bigger fish has a lump on it. The fish range from 1" up to 7" long not very big.
how big should the air pump be? Does adding zeolite to pond help?
appreciate your help thankyou
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Hanna
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Re: goldfish with white like coating on them
« Reply #3 on: August 29, 2010, 09:37:49 PM »

Nitrates are the last step in the nitrogen cycle.

Did you test for Ammonia and Nitrites too?
What are the exact numbers, they are written next to the colour charts.

pH in the blue means it is alkalinic, but how much? what is the number next to the colour?

Zeolithe is a very good filter media, it is known to remove Ammonia and Nitrites too.
Waterchange will be good, about 40-50%.
But check pH and temp of the fresh water and add conditioner and beneficial bacteria.

The lump could be a tumour, but hard to tell without pics. It could be sth else too.

Which region do you live?
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leviathan
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Re: goldfish with white like coating on them
« Reply #4 on: August 30, 2010, 08:50:14 PM »

I think the ph reading was above 9, i have since been to shops and bought a broad spectrum trament for the fish and some ph downer and have treated the pond as per instructions.
 i will test again today and see if any better.
 I live in Western Australia, in the north of the state. quite mild temperatures but we have had heaps of rain recently.  That is the only difference over the season.
I also tested again for nitrates and there are none showing up.
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Hanna
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Re: goldfish with white like coating on them
« Reply #5 on: August 31, 2010, 06:22:43 AM »

this is a VERY high pH, normaly goldies like 7.4 -8.0

You didn't mention anything about Ammonia and Nitrites. How are those readings?

Nitrates are the last step in the Nitrogen cycle, they will show last.

How are your fish going?
According to temp you shouldn't have too much fluctuation, but more the wet season and the dry season?
Here in QLD the nights are pretty chilly but the days are fine and now we're heading towards spring, yes we had lots of rain too
« Last Edit: August 31, 2010, 06:26:47 AM by Hanna » Logged
Nossie
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Re: goldfish with white like coating on them
« Reply #6 on: August 31, 2010, 02:43:18 PM »

pH above nine would annihilate any aquatic life, so that's probably out of question... I think your pond is suffering from new tank (or "pond" in this case?) syndrome, and it may also be a bit crowded.

Here's what you should do:
- Test everything, and give exact results! pH, ammonia, nitrite and nitrate
- Buy a good water conditioner/bio filter booster. I've got Easy Life Fluid Filter Medium, which is pretty much a water conditioner and a bio filter booster in one so you won't need two bottles. Very good stuff! It will not only help the beneficial bacteria in the pond but also take care of smaller wounds and infections of the fish as well as strengthen their immune system. (It will also neutralize ammonia and chemicals)
- Do a major water change if anything's wrong, at least 50% and dose for the whole pond.
- See if you can get rid of the koi (as in: give away), because they will grow huge. They need lots of space, and might bully the goldfish.
- After this is done, add some anti-bacterial medication, no melafix, pimafix or any cr*p like that. It won't deal with any bacteria. But something for bacterial infections, something specifically for fin rot would be ideal!
- Now you should be testing the water daily, pH and everything else. Change a bit of water whenever the ammonia, nitrite or nitrates are too high. Always replace the dosage of medication, as well as the dose of water conditioner and bio filter booster.
- Observe your fish, and wait.

Good luck Smiley
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