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Black Smudgy Spots Appearing On My Fish


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9 replies to this topic

#1 ellie

ellie
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  • Location: innaloo

Posted 06 October 2017 - 08:26 PM

Type of fish: clown loaches and various Malawi cichlids and peacoks
Symptoms: black smudgy spots appearing on their body
Other tank mates:
Tank size / capacity: 680 litres
Type of Food fed: algae pellets , floating and sinking cichlid pellets
Feeding frequency/amount: feed daily only what they can eat in a minute or two
Substrate: sand 
Type of filtration: 2 ext canister filters
Frequency of filter cleans: rotated 1 per fortnight
Frequency and % volume of water changes: weekly  25%
Last water change: 4 days ago 
PH:
KH:
GH:
Nitrite:
Nitrate:
Ammonia:
Phosphate:
Water temp: 26 degrees
Medications used recently to date: none 
Any recent changes..new fish/filters/power outages etc etc:  filter is about a month or so old and just added 2 princess cichlids one of which now has a black spot too

 

its really weird ive noticed a lot of my fish are getting these smudge ink looking black spots and they aren't small spots either well some are lol

apart from the spots they are fine they are all acting normal eating and breeding as usual 

none of them are flicking around or look sick though I do have one red jewel that has a gill sticking out looking kinda injured but she did that a few weeks ago

and is perfectly fine except for looking kinda deformed 

any advice would be greatly appreciated ive googled till my fingers hurt but cant find an answer

the most affected are the loaches and they didn't have the spots  when they were in the big 1300 ltre tank

cheers peeps


Edited by ellie, 06 October 2017 - 09:30 PM.


#2 moses123

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Posted 06 October 2017 - 11:43 PM

Got any photos?
Once my fish had black spots but they showed no other symptoms. All healthy and eating like normal. Turns out it was a side effect of feeding too much spirulina.

What exactly are you feeding fish? Try limiting the foods with a high percentage of spirulina and see what happens.

Good luck.

#3 ellie

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Posted 06 October 2017 - 11:56 PM

will try get pics n post them tomorrow 

i thought of that but the thing is they get the same food in both tanks but its only happening in one

i use the hikari algae wafer and im pretty sure the sinking pellets are hikari too but will double check



#4 Ageofaquariums

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Posted 07 October 2017 - 02:37 PM

Possible melanophore migration due to ammonia burn about 2 weeks ago. Its a sign of healing but yea, the cause was prob weeks ago.



#5 malawiman85

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  • Location: Mindarie

Posted 07 October 2017 - 09:24 PM

Beat me to it.
Ammonia is my guess.

#6 ellie

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Posted 07 October 2017 - 11:42 PM

hmmm how come come the new fish had a black mark the day after i put it in

im gonna test the water 



#7 malawiman85

malawiman85

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Posted 08 October 2017 - 07:04 AM

Water tests won't likely reveal ammonia... Ammo comes n goes too quick and as AoA pointed out if it was ammonia, it probably wasn't recent.
Google "ammonia burn fish" or similar and have a look at the variety of black blotches on images and see if it matches what you have.

#8 ellie

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Posted 08 October 2017 - 01:32 PM

ok  i had a ggogle it does look like that and it makes sense whats the best way to keep the ammonia lvls down 



#9 malawiman85

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Posted 08 October 2017 - 02:31 PM

Make sure your filtration levels are adequate.
Ensure filters are cleaned carefully in a bucket of old tank water.
Don't clean filters at the same time if you can help it.
Don't over feed.
Make sure excess food and waste is removed from the tank.
Don't suddenly increase the bioload... Do it gradually.

#10 Delapool

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Posted 08 October 2017 - 10:44 PM

Something like the api FW master test kit would be worth picking up. You could check for ammonia still but if the ammonia is gone (hopefully so!), you may see a nitrate spike.

One other is that other products can cause burns eg h2o2, etc. just in case.




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