What Did I Do Wrong..

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CKutz

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well i know kribs can be more territorial than most tropical fish..but i didn't expect this.
i have a 30 gal. we got 1 swordtail, 1 lavender (color morph of blue i think) gourami, 2 female kribs (meant to get a m/f, taking them back on saturday). there was just a little picking at first..the kribs lit up at each other pretty fiercely, but now just chase each other sometimes.

anyways. my girlfriend broke her tank, got all upset, and since she can't take fish to school in the fall she doesn't want to get another tank. i was on my way back to school..and told her to put them in my tank at home, the 30 gal.

my brother says he acclimated them like i told him (in bags adding a little tank water for around 45 min.) and let them out.

she had: 1 black balloon molly, 2 female platy's (two of my babies from several months ago, about 1.5" long now maybe) 1 female betta, 3 longfin zebra danios.

my brother added them, said everything was fine. now today i guess when he was going to school he saw the kribs and swordtail (he's a male, and they are female, i'm guessing that's what that was about) picking on the one female platy and didn't have time to do anything about it. when he came home, she was dead. a little while after i got that call, he called back to say the balloon molly had been staying in one corner and not swimming around, and that the kribs just attacked her and ripped up her tail. we don't have another tank at home yet so i told him to get her out and put her in a bag in the tank with freshwater at the same temp as the tank and keep the bag open. he still says no one bothers the female betta. and i think the zebra danios are probably too fast to be bothered by anyone.

so what's up with the kribs? are they always this aggressive? or was it some type of territorial thing? if we get a m/f are they going to be worse?do you think german blue rams would be less territorial?
i knew we might have some issues with the kribs, but i thought for the most part they were community fish and wouldn't cause anything so serious.

edit:
thought i'd add that i'm not planning on keeping my girlfriends fish..haven't really figured out what i'll do yet, waiting to go home this weekend and sort things out.
 
Hey Ckutz!

A 30 gallon tank with your fish + your girlfriends fish is getting pretty close to the fulls socking limit of that tank.

The thing with Kribs are that they are aggressive territorial fish.

What has happened is; your fish were fine before you added you girlfriends fish because everyone in your tank has found his/her status among all the fish in your tank, with your Kribs most likely at the top.

What happens when you add new fish to a tank that has Cichlids (Kribs), is that this Status order is unknown to the new fish, and they do not know the territory that the Kribs "own" in your tank. So the new fish start to swim everywhere. Well, the Kribs see this and do not like the new fish, because they are invading their territory, so the Kribs retaliate by nipping and chasing the new comers all over the place.

Until some new fish die off, or they learn their status among the rest, they will constantly be nipped at.\

Hope this makes sense?

Hope you can find a new home for your girlfriends fish too!

-FHM
 
yea i kinda thought it might be something like this...where they already had established territories..i just didn't expect them to be so aggressive about it as to kill the other fish..but those fish were probably pretty stressed out already.

gosh i can't wait to go home and get this all straightened out haha.
 
yea i kinda thought it might be something like this...where they already had established territories..i just didn't expect them to be so aggressive about it as to kill the other fish..but those fish were probably pretty stressed out already.

gosh i can't wait to go home and get this all straightened out haha.
I bet!

I had a fish die one time on me a couple weeks back, stress related, and I could do nothing about it because I was here.

If only I put him into a different tank, which I have, he probably would of made it!

-FHM
 

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