Fish are dying, I'm clueless

paradigmcubed

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Mar 15, 2003
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I originally had 1 dwarf Gourami, 1 Blue Gourami, 1 Paradise Fish, 2 Mollies, 1 Angel Fish, 2 Tetras, 1 Pictus Catfish and 3 Zebras. I don't know what is happening but, I have lost 2 Mollies, 1 Angel Fish, 1 Tetra and 1 Zebra(presumed eaten, was a baby) I really don't think this is normal to have lost 5 really 4 fish from a total of 12 fish. 1:3 ratio. I am bewildered because none of my fish expressed any weird sypmtoms. I did put two rocks in the fish tank, however I put them in chlorine and then boiled the. I really doubt I overfed them, tried to stick to the feed for 3 minutes rule. Any ideas?? I really would like to not lose any more fish, even 1 death is more than enough. On Saturday I will be going to take a water sample to the fish store and I'll post those results, I'm guessing that will be the key.........
 
Two questions:

1. How old is your tank? Is it newly setup or been running for a while. If it is newly set-up, did it complete its cycle?

2. You say you soaked the rocks in Chlorine then boiled them. After doing this, did you rinse them very well in clean water with LOTS of dechlorinator? if not, the rocks could be leaching Chlorine - which would be toxic to the fish. Did they still smell like bleach when you put them in the tank?
 
i think that this may have been a mix of things. firstly, i believe you stocked too much too soon. normally allow at least 2 weeks for cycling, and after cycling stock slowly, so that your filters can adapt to the extra bioload more easily. i really dont see why you did soak your rocks in chlorine, i would have thought that boiling the rocks would have sufficed. there is an underlying problem here, as you dont just lose a third of your fish for no reason, and i would say it is because you did not cycle the tank for long enough, and then adding all those fish. i think you may be in for quite a shock when you get those water test results...

how big is your tank?

paradise fish do not do well in communities, and in essence do better in lower temperatures than most tropical fish.

tetras, angelfish and danios all like to shoal, and for angelfish this should be a group of at least 3, and the danios ansd tetras shoul dbe in groups of at least 5, preferrably more.
 
thom's right. and you may need longer than 2 weeks. my 55 took about 6 weeks to fully cycle. you should read the thread posted at the very top of this forum. it has a few links to check out on cycling and such.

does zebra mean zebra danio? you may lose every fish but these. theyre pretty hardy. i cycled my tank with 7 and theyre still with me. read up and do alot of research before you buy anymore fish. most of all, be patient. your tank will be the way you want it soon enough, and the fish will prosper and give you alot of enjoyment. good luck.
 
Originally posted by paradigmcubed
My tank is fairly new. I bought it a couple of weeks ago and allowed it to cycle for one week. I washed the rocks in water. They didn't smell like bleach when I put them in.

Bought 2 weeks ago, then filled with water and allowed to sit for a week empty? What chemicals did you add to this, and when?

Then you added 12 fish, all at once?

You have no test kits?

Have you changed any water? How often do you feed? How much?

Have you cleaned the filter? How?
 
Well, I agree with Thom that it is likely the tank did not fully cycle - and that is probably the main cause of your problems.

but i am a bit worried that you only rinsed the rocks in water after the chlorine. Rinsing in water may not solely get rid of the chlorine - hence why you would have had to rinse in water with lots of dechlorinator added.

To be on the safe side, I would remove the rocks, put them in a bucket of clean water and lotys of whatever dechlorinator you use.

Then focus on the bigger problem - which is getting your tank fully cycled as per Thom's post above
 
Bought 2 weeks ago, then filled with water and allowed to sit for a week empty? What chemicals did you add to this, and when?

-Let's see, I bought this 20 gallon fish tank at Petsupermarket and allowed it to sit for 1 1/3 weeks. When I put the water in I also put some of the stress coat or dechlorination. I added that immediately after putting the water in.

Then you added 12 fish, all at once?

-Then I added the fish over the next week, not all at once, but a one or two at a time.

Have you changed any water? How often do you feed? How much?

-Yes, I changed 15%-20% of the water after one week. I feed them as much flakes as they can eat in three minutes and I feed them once a day. I also give them 1-2 shrimp pellets daily.

You have no test kits?

-I called a LFS and they said I might as well bring the water in rather than test it myself.

i really dont see why you did soak your rocks in chlorine, i would have thought that boiling the rocks would have sufficed.

-I actually posted a question on this and was told by some members to boil it and bleach the rocks.

how big is your tank?

-My tank is a 20 gallon, I actually posted my fish list earlier and some members thought I was all right in the number of fish, however they said nothing more than a corie should be added. According to my LFS it was alright to add 1-2 over 7 days.

Hope this helps......
 
Cycling refers to providing the tank with a means for processing the nitrogen components, usually with bacteria populations. This tank wasn't cycled--it was, at most, aged, then slowly stocked.

Don't believe everything you hear from the LFS. They have a financial motive--ie, Cycle is snake oil, but they make money off it. Then they make more money off you when you come back to replace the fish that died because of ammonia/nitrite toxicity.

Not your fault--there is a strong expectation that LFS employees know what they are talking about. And, many are in fact wonderful, competent aquarists. But, sometimes they aren't all that bright.
 
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