Black Neons with white patch on head... - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 18 Old 09-02-2011, 04:06 PM Thread Starter
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Black Neons with white patch on head...

1. Size of tank? 75 gallon

2. Water parameters
a. Ammonia? Zero
b. Nitrite? Zero
c. Nitrate? 20-30
d. pH, KH and GH? pH 7.6, unsure on the others
e. Test kit? API liquid

3. Temperature? 78

4. FW (fresh water) or BW (brackish)? Fresh

5. How long the aquarium has been set up? 2 months, just finished cycling

6. What fish do you have? How many are in your tank? How big are they? How long have you had them?
Had 11 Black Neons, lost two today. 8 Glowlight Tetras, 3 otocats. All are <2" and they have been in the tank since yesterday.
7. Were the fish placed under quarantine period (minus the first batch from the point wherein the tank is ready to accommodate the inhabitants)? No since they were the first fish in the tank.

8. a. Any live plants? Fake plants? Live plants
b. Sand, gravel, barebottom? Sand
c. Rocks, woods, fancy decors? Any hollow decors? Rocks and one small piece of wood covered with java moss

9. a. Filtration? AquaClear 110 with two sponges
b. Heater? EboJager 250w

10. a. Lighting schedule? What lights are used? Four 6500k T8 tubes
b. Any sunlight exposure? How long? None

11. a. Water change schedule?
b. Volume of water changed?
c. Well water, tap water, RO water? Tap water
d. Water conditioner used? API Stress Coat +
e. Frequency of gravel/sand (if any) vacuumed?

12. Foods?
How often are they fed? Tropical flakes, twice a day

13. a. Any abnormal signs/symptoms?
b. Appearance of poop?
c. Appearance of gills? Normal

14. a. Have you treated your fish ahead of diagnosis?
b. What meds were used?

15. Insert photos of fish in question and full tank shot if necessary.

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post #2 of 18 Old 09-02-2011, 04:09 PM Thread Starter
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As you can see...there is a white patch on top just in front of the pectoral fin that appears to be under the scales and white stuff coming from the mouth of this fish. One other fish, also a Black Neon, has the patch on top but nothing in the mouth. A third Black Neon has a few small white specs on its tail. Two Black Neons were found dead/dying when I got home from school today but neither appeared to be affected with white "stuff". All fish were placed in the tank yesterday.
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post #3 of 18 Old 09-02-2011, 04:26 PM
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From the picture posted I am thinking that it is probably columnaris. You will want to keep the water pristine, and I would try to keep nitrates no higher than 20 and if possible lower. Here is some information about columnaris from the freshwater and saltwater diseases thread.

Columnaris (Flexibacter columnaris)

Cotton-wool, Mouth Fungus, Flexibacter

White mouth with tiny filaments, white areas near edge of scales, clamped fins, fins start to rot in the later stage, fish struggles and sways near the surface

This is bacterial infection which is very common in the aquaria and is very contagious. Immediate action is needed to contain it before it spreads to other fish.

Broad spectrum antibiotics, Sera Baktopur, Binox, Maracyn I & II, Kanacyn, Terramycin, Acriflavine, Furan, Copper Sulfate

Flexibacter columnaris thrives very well in warm waters therefore it is necessary to gradually lower the temperature to prevent it from progressing.

Pictures retrieved from Sera guide by Dieter Untergasser for reference purposes.

Read more:

It is possible that it could be body fungus also, but with the cottony filaments around the mouth area I would lean more towards columnaris. I would first see if keeping the water pristine helps before considering starting treatment. If it does not seem to be improving then you will want to consider doing a treatment with medicine.
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post #4 of 18 Old 09-02-2011, 05:38 PM Thread Starter
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Thanks. The patch is kinda fuzzy but not fluffy...there is another fish acting strange...gasping and staying at the surface of the water and yet another fish with some white specs on its tail. I have Furan 2 on hand...I just want to get more info before I start treating.
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post #5 of 18 Old 09-02-2011, 05:49 PM Thread Starter
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Gasping fish just started acting like that less than an hour ago.
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post #6 of 18 Old 09-02-2011, 05:59 PM
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Sorry to hear about another loss. I have found some additional information on columnaris, which can also affect the gills of fish. Here is the link to what I came across Columnaris (Flexibacteria); Aquarium/Pond Treatment, Prevention; Fungus, Saprolegnia
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post #7 of 18 Old 09-02-2011, 06:29 PM Thread Starter
Nubster's Avatar was a good read. I think I am going to go ahead and treat with the Furan 2 and try to pickup some Kanamycin too. Maybe some Pimafix as well just in case the other stuff doesn't work. Might not be back to have on hand anyways. Hopefully the local stores have stuff so I don't have to order it and wait until next week.
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post #8 of 18 Old 09-02-2011, 06:31 PM
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Most of your lfs and lps that sell fish should have these on hand. Good luck and keep us updated on how things go.
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post #9 of 18 Old 09-02-2011, 06:39 PM Thread Starter
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Definitely will. Thanks again.
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post #10 of 18 Old 09-02-2011, 08:57 PM Thread Starter
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Another seemly unaffected neon dead while the two covered with white patches still alive. Don't understand.
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