Problem with fish dying---need advice please!

Sunny

AC Members
Jun 24, 2004
120
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Texas, USA
excoboard.com
Hi!

My husband and I are fairly new to the hobby. (We have had the tank for almost a year now) We have an 80g tank with about 10 cichlids, close in size. My husband is very good about testing the water regularly, changing it, keeping the high PH and a clean tank. In fact, he must have been doing such a great job that some of the fish started to mate. Our Kenyi's had babies and the babies are doing extremely well and growing healthy.

The two main dominant males in the tank are one Kenyi and one Johanni. The Johanni was added to the tank last, he is slightly larger than the rest, a beautiful healthy fish, but rather agressive.

Everything seemed to be going well, when suddenly some of the fish started dying, one by one. First, the two labs died for what seemed to be no reason. They stopped eating and other fish started picking on them. We have a lot of caves in the tank and it was impossible to catch the fish until it was dying and nothing could help it. Right before the fish died their bodies were quite picked on, especially tail fins. Now our albino cichlid, who has been growing well and eating more than anybody else in the tank, started to get picked on. I managed to catch him and put him into a separate tank, but the areas where he's been picked on are now turning reddish colour and so is his tail fin. He is not eating and I am worried.

I am especially worried about the rest of the tank. It seems that every time one fish goes, they start picking on the next. What's going on? Please help! Thank you in advance.
 
Well, I'm no expert, but I may have a couple ideas. First off, what are the dimensions of your 80 gal. tank? My guess is 4ft. in length. If that is the case, it may be too short to house a breeding pair of Kenyi and an agressive Johanni. I have had more experience with Johanni, and they have been suspects in more than one death in my tanks. The labs are very passive fish, and would be an easy target for alot of other fish. You may want to set up a seperate tank for your breeders, or rearrange your existing decor. I have found this to work often in my past experiences. Chances are good that if conditions are good enough for breeding in your tank, your water parameters are not going to be killing them off. I would look towards another fish/fishes to be the culprit. Take my words with a grain of salt. I am no expert, I speak only from experience. Best of luck.
 
Could it be that the increased pop density caused by developing fry in the tank has caused the dominant breeders to become more aggresive? It seems that cichlids also tend to become more aggresive as they mature and become more established in their "territory". I would agree that a seperate tank for whatever fish is breeding at the time might help since they are more than likely the culprit. this is just an impresion since I have no personal experience with large africans.
 
The breeding caught us completely by surprise. We learned about it when noticed baby fish hiding in the rocks, which explained why the femal Kenyi had been acting strange prior to this. We then tried to catch the babies and the lab that was also expecying babies at that time, but were unsuccessful. They are not only fast, but hide inside the caves when they see the net inside the tank. :thud:
 
I have seen several posts where people advocated a fry trap of sorts. Any contraption where the opening was cone shaped and pointed inward would probably worked. Like the minnow traps you can buy in sporting goods stores only scaled way down. Just an idea. Good Luck.
 
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