one of my fish is hurt

Mif

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so, I rented a new house and was given a pond with 12 fish (now 16 because we bought more) and it was murky and horrible. after multiple weeks of working, cleaning filters and going to pond stores for multiple water treaters, we've gotten it clear and got the filter to do its job. (this could've been very stressful for the fish, so it might help)

now we can see clearly inside the pond we've noticed out biggest fish has two problems:
1. there is a wound near the base of the fins. (there is a picture)
2. there is a few green spots on it's head that look like fungi

I need help with the wound on its tail because I don't know what to do, but if anyone has any ideas about the fungi I'd love to hear them. we've ordered a formula made to help with fish infections and are hoping that'll work.
IMG_4599.jpeg
 

addy1

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Welcome to our forum. Those that have koi will chime in with treatments.
I only do goldfish

Don't add anymore fish you might introduce disease. And how big is your pond, how is it filtered? What are the water tests results? You might need to buy a water test kit, API makes a great one, liquid.
 

Mif

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Welcome to our forum. Those that have koi will chime in with treatments.
I only do goldfish

Don't add anymore fish you might introduce disease. And how big is your pond, how is it filtered? What are the water tests results? You might need to buy a water test kit, API makes a great one, liquid.
My post is 280cm x 100cm x 60cm, and adds up to about 1,680 litres (369 Gal), and is filtered with Kockney Koi KF 5000v Multi bay filter (screenshot attached). I just did a water test for kh gh and ph. GH- 5 KH- 40 pH- 8.5. last time I checked on the nitrates they were both under 20 and 0.5 respectively. my dad says that we should leave it to settle and the KH and pH will drop (I wouldn't trust him, we're both beginners)
Screenshot 2019-04-22 at 14.54.19.png
 
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What kind of fish? I’m thinking you’re overstocked. Koi need 1000 gallons, each, goldfish need 60 or so once full grown. Get a large plastic container, a tote or kiddie pool, fill with pond water, add a small pump and remove your injured fish for singular treatment. Melafix is one I’ve used with good results, but good water conditions and time will fix the wounds. The big concern would be the infection going on. Watch all your fish closely, the others may catch it and need treatment too.
 

Mif

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What kind of fish? I’m thinking you’re overstocked. Koi need 1000 gallons, each, goldfish need 60 or so once full grown. Get a large plastic container, a tote or kiddie pool, fill with pond water, add a small pump and remove your injured fish for singular treatment. Melafix is one I’ve used with good results, but good water conditions and time will fix the wounds. The big concern would be the infection going on. Watch all your fish closely, the others may catch it and need treatment too.
I don't know what kind of fish the one I'm having trouble with is but I know that almost all the other fish are a type of goldfish except another Tench we have.
and thanks for the help, I'll be doing that by tomorrow hopefully.
 

Mif

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What kind of fish? I’m thinking you’re overstocked. Koi need 1000 gallons, each, goldfish need 60 or so once full grown. Get a large plastic container, a tote or kiddie pool, fill with pond water, add a small pump and remove your injured fish for singular treatment. Melafix is one I’ve used with good results, but good water conditions and time will fix the wounds. The big concern would be the infection going on. Watch all your fish closely, the others may catch it and need treatment too.
I just found out it may be a blue orfe (according to the landlord). I checked a few images and it seems to match it
 

mrsclem

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You may want to do some research regarding the types of fish. Blue orfe can get to be 24" and require a large pond with a lot of aeration. Is the landlord helping you at all with the pond or did he just leave it for you to take care of?
 

Mif

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You may want to do some research regarding the types of fish. Blue orfe can get to be 24" and require a large pond with a lot of aeration. Is the landlord helping you at all with the pond or did he just leave it for you to take care of?
we've just been left alone but we're happy to do anything to make the fish survive. and I probably should look up the full sizes of all the fish but there's nowhere for them to go if their water space isn't good enough.
 

Mif

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update on the fish's health
a noticeable lump has appeared on the back which has a yellow tint, and you can clearly see there's something wrong. my parents decided to not take it out and are saying that if they put the medicine in the pond that it'll fix everything.

here's a photo I took a few minutes ago.
IMG_4625.jpeg
 
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Medicine will not help this fish.
You need to establish what the water quality is, fix it and feed the fish. In that order.
 

Mif

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Medicine will not help this fish.
You need to establish what the water quality is, fix it and feed the fish. In that order.
my dad finally listened because of you, thanks!
 

Mif

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my parents and I have considered salt baths to try and improve it as we don't have the things to help the pH and KH yet. would it be a bad idea because of a weakened immune system and the harmful minerals in the water?
 
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Fix the water feed the fish quality food I also use a product called koi zyme it is very effective in healing wounds. Especially this time of year. I had a fish get trapped between two rocks scraped 50% of her scales off ended up with two ulcers on each side of her thought for sure she was going to die my water quality was excellent I did salt bath her the first 48 hours to balance the fluids. And then use koi zyme. She turned completely White she was orange but she healed completely and lived to see another season. Spawning accident
 
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my parents and I have considered salt baths to try and improve it as we don't have the things to help the pH and KH yet. would it be a bad idea because of a weakened immune system and the harmful minerals in the water?
Test the water before you do anything further.
Most local fish or pond stores will test the water for free.
 

Mif

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i'v tested the water again today, and the water hardness is not getting better, but we've got something to bring it down and hopefully that will take effect asap
 

Mif

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thanks for all of your help, but today my fish is turning on its side and the infection is everywhere on it. this might be its final day.
 
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It would help if you could give us a complete picture of your pond water chemistry and maintenance routine.
That includes ammonia, nitrite, nitrate, KH, GH, temperature, PH, plus what time you take the PH morning or evening. Measurements at morning and evening are helpful.
Your GH is ok, your high KH isn't that much of an issue on it's own. High KH prevents a sudden drop in PH.
Use a liquid drop test kit instead of strips.

It may be too late for this fish, but if you would like to add more fish in the future, it's very important that you have good water quality.
 

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