Fungal infection? Please help!

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Joined: Wed Mar 19, 2014 3:56 pm

Fungal infection? Please help!

Post by fishkeeper07 » Wed Mar 19, 2014 6:04 pm


About 5 week ago I noticed a 'shiny' white and silver/grey patch on one of my clown loaches that spanned most of one side of his body. My nitrates were reading a little high (around 60ppm) so I did several large water changes until they were down to 20ppm. The patch did not go away and one of my other clowns started to show a similar much smaller patch so I started treating with Paraguard. I just finished treating the tank for 10 days and also did 3 x 1.5 hour baths in the higher concentration of the solution. About a week ago I noticed that my 8 inch synodontis nigriventris started showing small patches and had sort of 'cloudy' eyes. He also became more reclusive (especially after doing the Paraguard baths). The patches on him are small and don't show on camera and I can't say for certain if the are just nicks or something more sinister.

Over the course of the last few days I have started to notice symptoms on all 5 of my clown loaches. They are all quite young and about 1.5-2.5 inches in length. The weird thing is that the symptoms seem to vary from fish to fish. Some have that large shiny patch (not raised, no fuzz), others have duller, smaller white patches on their heads, a few have fins that a starting to deteriorate (no fuzz, just bits missing) and now I've noticed two have otherwise healthy looking fins with stringy white material coming off them (although it is quite short so no sure if it's fungus or a parasite). All the loaches show good color and seem to be active and eating, but I'm worried as whatever they have seems to be getting worse and has been unaffected by Paraguard.

Below are my tank details:

50 gallon freshwater tank (5x2" clown loaches, 1x8" synodontis nigriventris, 1x5" Chinese algae eater, 3 x 1" white cloud minnow).
Tank has been set up for about 2 months.
Using a Filstar XP M canister filter (carbon removed due to Paraguard treatment)
Typically do 20% water change/grave vacuum weekly, have not done on in the last 10 days due to Paraguard treatment.

I am thinking that I need to treat with an antibiotic? Should I be using Maracyn, Maracyn-2 or something else? Any advice on what I should do next would be greatly appreciated! I would really like to save these fish.

Thank you.

Posts: 2
Joined: Wed Mar 19, 2014 3:56 pm

Re: Fungal infection? Please help!

Post by fishkeeper07 » Thu Mar 20, 2014 2:40 pm


The clown loaches seem ok, they are out eating and acting normally. Just these weird marks showing up. The catfish however has been acting a bit reclusive and less animated than normal since performing the dips in Paraguard. I hope he's ok, it's been a few days since the last dip and he still seems 'dopey'.

I think I am going to start treatment with Maracyn and Maracyn-2 tonight. I know clown loaches tend to be quite delicate when it comes to treatment, I hope this is the correct course of action.

I just relized I did not post my water parameters in the original post:
Ph: 7.4
Amonia: 0ppm
Nitrites: 0ppm
Nitrates: 20ppm

I did a 50% water change yesterday and noticed the first bucket of water came out quite brown. I wonder if this could be a result of the Paraguard treatment? I checked the suction to the filter intake (Filstar XP2) and it doesn't seem to be that strong (ie it is not pulling in small bits that float near it and I cannot feel the suction on my hand). Water is definitely being pulled through though as it is coming out the outtake. Is this normal?

Also, I noticed lots of small white flakes and stringy things (about 1-2cm long) floating in the tank after vacuuming the gravel. Could this be bacteria?

Any help at all would be much appreciated!!!

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Re: Fungal infection? Please help!

Post by Diana » Sun Mar 23, 2014 8:37 pm

This sure sounds like Columnaris. Other common names include Saddle Disease, various terms that include 'Fungus', and Fin Rot.
A bacterial disease that is caused by the bacteria Flavobacteria columnaris. It is not a fungus.

The bacteria start on the exterior of the fish, often on the dorsal surface (thus 'saddle disease') but can also cause fin rot (several bacteria can cause fin rot) and can also start on or near the mouth, so 'Mouth Fungus'.
It can move to internal infection.

It tends to thrive in water with high nitrates, or else the fishes' immunity is a bit stressed when the nitrates are up so the bacteria can move in easier.

Anti-parasite meds won't help.

Treat with antibiotics that handle Gram negative bacteria. A medicated food is good.
38 tanks, 2 ponds over 4000 liters of water to keep clean and fresh.

Happy fish keeping!

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