Catfish Murderer :( - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 18 Old 08-23-2011, 08:32 AM Thread Starter
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Catfish Murderer :(

Hello,
I am a new member to this forum and I just recently setup my first planted tank. It is a 30 gallon tank with an aqueon HOB filter, added co2 (DIY), and medium full spectrum lighing. All my fish seem to be doing fine except for the plecos. i have killed two of them already and cant figure out why. The ph is steady at 6.4 and the amonia levels are almost nonexistant. Could the oxigen level be two low or something?
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post #2 of 18 Old 08-23-2011, 08:44 AM
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If they are dying shortly after you get them, but the other fish are fine it is quite possible it was a bad batch from the LFS. Do you have any bigger real rock in the tank? The real rock in my tank was the problem, after I removed the one in question everything was fine. It was leaching something into the tank that was slowly killing some of the fish. All levels looked normal but it was the rock.

20 Gallon Planted Guppy tank. Amazon Sword, Dwarf Hairgrass, Cardinalis.
55 Gallon -1 BN Pleco, 1 High Fin Syndontis, 1 Oto, ~18 Kenyi Cichlids
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post #3 of 18 Old 08-23-2011, 09:34 AM
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also if the tank is new there is nothing for them to feed on... they tend to graze on and off not do the typical "feeding time" routine....

i agree with deman3 though check all rocks and or wood in the tank if it was not specifically sold for a fish tank and or prepared very well before putting it in (boiled sterilized etc) i would remove it and see if things improve...

Back in the Game!!! Live Bearers in a 40 Breeder
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post #4 of 18 Old 08-23-2011, 10:04 AM
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Shouldn't have Common Pleco in a 30 gallon anyways. They get far too big. If it's some other type, maybe.
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post #5 of 18 Old 08-23-2011, 10:11 AM
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Common Pl
ec do get huge. I have had good luck with my BN plecs and I think they are more interseting to look at than the commons.

20 Gallon Planted Guppy tank. Amazon Sword, Dwarf Hairgrass, Cardinalis.
55 Gallon -1 BN Pleco, 1 High Fin Syndontis, 1 Oto, ~18 Kenyi Cichlids
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post #6 of 18 Old 08-23-2011, 10:16 AM Thread Starter
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Thanks ofr your help. I do have rocks in there that I sould have sterilized instead of just rinsing off so I will take care of that asap and hopefully get better results. And dont worry about the tank size, I have a 55 gallon that I am setting up so when the placo gets too big for the 30 the 55 should be very much up and running for a while.
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post #7 of 18 Old 08-23-2011, 10:19 AM
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55 still isn't big enough for a common pleco.
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post #8 of 18 Old 08-23-2011, 11:11 AM
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As others have mentioned in a new tank there is not enough food in the tank for them to live on, and depending on how many and what type you have the algae that is in the tank can diminish real quick. Make sure that you are providing an additonal source of food for the plecos, such as algae wafers, do not expect the fish to live on scavanging alone. Along with the fact that many plecos as they get older like the common pleco will stop eating algae. Also for some plecos it is essential for them to have driftwood which for some make up part of their diet. Check out the fish profiles here to find out more about their requirements, you can view the profile by either clicking on the shaded name, or you can go to the profiles section by clicking on the tab at the top of the page second from the left.
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post #9 of 18 Old 08-23-2011, 12:19 PM
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It may not be enough to just sterilize the rock. Do the vinegar test on them. It is possible that you have a rock that is not inert in your tank, as was the my case. If the rock is small you can just dip it into a bowl filled with vinegar. If there is fizz, don't put it back in the tank. If there isn't fizz, the rock is inert and should be safe. If it is a large rock you can just drizzle the vinegar over it. Non-Inert rocks will leach properties into the tank that change the water quality without adjusting the ammonia, nitrites or trates.

20 Gallon Planted Guppy tank. Amazon Sword, Dwarf Hairgrass, Cardinalis.
55 Gallon -1 BN Pleco, 1 High Fin Syndontis, 1 Oto, ~18 Kenyi Cichlids
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post #10 of 18 Old 08-23-2011, 12:43 PM
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Do you have other bottom fish in the tank other then the Pleco? I wonder if there is too much CO2 in the tank and the bottom dwellers are getting gassed out. Are the other fish hanging out near the top of the tank when they are mid-level or bottom fish?
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