Evil Killer Fish!

[grumpymole]

i was under the impression that these sharks are not very dangeurous at all
apart from silvers
according to my garden centre/fish shop

 

[WILDER]

Lfs can lie.
http/www.personalpetadvice.biz.ly/articl...edtailshark.htm

 

[grumpymole]

noooooooooooooooooooooooooooooooo!!!!
how dare my beloved fish centre lie to me!???!!!

thanx for info. <sniff,sniff>

 

[kniesh]

Be careful that the Red Tailed BlackSharks were not mis-labelled. My lfs was selling Ruby Sharks as Rtbs. It was difficult to tell in the shop but I could see slightly red finns aswell as tail. Ruby Sharks aren't as aggressive as RTBs and could tolerate each other. Once I bought mine and introduced him into the tank he seemed to blossom and has clear red fins now. Just thought u should check b4 taking one back.

 

[grumpymole]

already encountered this problem, they were selling black neon tetras as normal ones, easy to spot though as the black ones are black.

 

[@ombomb]

Ruby Sharks aren't as aggressive as RTBs and could tolerate each other.

Please note that this is complete nonsense.

Ruby / Rainbow sharks can be every bit as aggressive towards tank mates, again PARTICULARLY their own species / sub species.

 

[kniesh]

Yeah they seem to do it a lot. Can work in ur favour if u recognise a good fish mis-labelled. Can also be quite dangerous for the fish if u dont know. All too common problem though.

 

[grumpymole]

my red-tails have shown no sign of aggresion towards eachother yet
although they are juvinille

 

[@ombomb]

Best to remove one of them asap then, it's only a matter of time, you can not keep the two of them in the same tank.

 

[grumpymole]

ok ty

 

[sylvia]

The sharks need to be seperated before they are mature. BTW, silver sharks are actualy a schooling fish so that's also nonsense - the only downside to them is that they get to big for anything smaller than 125 gallons.

Anyway, back to the rainbows - what species are they exactly? I want the scientific name. Also, are you certain they were the ones being aggressive or did you just assume this? Did you actualy see something happen? What was it you saw exactly? Which of your other fish were they attacking (if any)? Do they attack each other at all? How big/old are they? It occurs to me that your problem may simply be stress from the rainbows being in too small a group - rainbows become rather nervous when not kept in a group of at least 6-8.

 

[grumpymole]

ok thank u

 

[dwarfgourami]

thats them
i have already done water change
cant change water too often though as tetras gnerally preffer 6 week old water

You've misunderstood this bit. Tetras prefer 6 months old TANKS, i.e. tanks that have been up and running for 6 months (with regular water changes). The reason for this is that they are sensitive to ammonia and nitrites, which are more likely to occur in a new tank. The way to combat ammonia and nitrite in a new tank is to change some of the water. Weekly water changes of say 20% are a part of regular tank maintenance anyway, but in a new tank, particularly one with tetras you can expect to do a lot more than this, maybe as often as once a day if you are getting high readings of ammonia and nitrites.

 

[grumpymole]

yeah, luckily ive been doing fishkeeping for a while now.
(ive just got more fish!) they are so cool

Tetras prefer 6 months old TANKS

i was told by lfs that they liked 6 WEEK old water!
so i plonked them in after 7 weeks.
could this pose a problem 6 months later?