AboutBrit Brit Expertise I can answer your questions about Bettas, most Freshwater Tropical Fish, compatibility between tropical freshwater fish, tips on how to set up a new aquarium, what fish to add, what temperature your tank should be at, etc.
I can answer questions about goldfish, and I know a bit about aquarium plants.
I can't answer questions concerning anything marine, and I know next to nothing about ponds, and even less about Cichlid breeding. So please don't ask.
If I am not sure about something, I will try to research it for you and get back to you very quickly.
I cannot magically cure your fish over the web, unfortunately, so please remember your fish's health depends solely on you.
Also, don't expect a detailed answer if I have not been given a detailed question. I can only do so much!
Details, details, details!!
(It does state what I need on the Ask A Question Page)
Experience I take care of over 3000 fish daily. I worked at Petsmart for a few years, and have had training in many areas, including aquaria and all the basics to keep fish happy and healthy. I met quite a few experts in the hobby and have learned a lot from them, and they have learned a lot from me :)
Also, I have done a lot of research and studying on my own time about not just fish but a lot of different house pets because I like to help people and help their pets.
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Adult Diploma
Expert: Brit Brit Date: 5/5/2008 Subject: Corydoras missing fin...
Question Hi, i hope you can help me with my question.
im a bit worried about a couple of bronze corys of mine, they belonged to my brother and were doing really well in his cold water tank with goldfish and a few others, but he lost interest and gave them to me. i have a number of fish tanks and different fish and decided i was in a good possition to take the corys on. they have been in my standard 2ft, fresh water tropical tank for about five months now, but in the last month or so i noticed they have no "dorsal" fin and the area where the fin should be is almost white. the spike that stands at the front of the fin is gone too, they only have a stub left.
the corys are fat and healthy, active, eating well and seem to get along fine with the other fish.
these are - 10 tetras, 5 other corys (one wild cory, four others whoes sp. i can not be sure of, they are a matalic green colour), 3 bristle noses, a pair of Kribensis, a sucker fish and a few snails.
tho the corys with missing fins look and behave normal, i have noticed they have taken to resting on plants above the gravle, i have never seen the other corys do this.
the other fish are all doing very well, im hoping to fave a batch of young kribs soon.
the pH is...bugger, its quite low...
Amonia is 0.
the pH has been how it is for quite a ong time, and all the other corys are fine, so im not sure if it is the pH that removed their fins.
hope you might have some ideas.
Jessica
Answer Hi Jessica,
It is hard to tell without seeing it, or knowing how long it took for the fin to disappear. It is quite possible that your Cichlids or even the pleco is picking on your cory. Kribs, while usually rather peaceful, are still Cichlids and may be aggressive towards smaller fish.
This may not happen when you are around, but it is always a possibility and you should not rule it out.
If you don't already, start adding aquarium salt to your tank to help prevent infections and consider moving your corys to a different tank.
