Cories seem lethargic, sometimes? - Tropical Fish Keeping - Aquarium fish care and resources

 
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post #1 of 5 Old 06-03-2009, 10:20 PM Thread Starter
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Cories seem lethargic, sometimes?

Well the title doesnt really fit but it was hard to find a few words to describe it. But I got 3 corys, very small less than 1" but they dont look like dwarf cories so Im guessing they are young. Right now they are living with my betta in a 10g divided in two (so 5g) but they are about to move with a female into a 10g (undivided). But they have been acting a little weird. They were all just laying in the same spot almost all day today, kinda scared me. But later tonight I did a 50% change to see if some fresh water would liven them up and they all gathered under the water pouring into the tank. If Ihad to guess it looked like they were trying to pull food out of the bubbles. I was pouring the water over the divider that was covered in brown diatoms so were they eating that? Does it have to be rushing in or can they just eat it off the wall, because there is alot in there but they obly seemed interested when it was being poured in. They have been ALOT more active since the water change but I dont think the water quality was bad before because I had just done a 30% change. Was it the new fresh water that helped or that it stirred up algae/food for them?

Thanks for any help.


Snowflake - Crowntail Male ~ Marina - Crowntail Female ~ Kingdra - Delta Male

3 Bettas
3 Neons
2 Cories

2 MTS
2 Cats
2 Parakeets

1 Ghost Shrimp
1 Chihuahua
1 Goldfish pond
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post #2 of 5 Old 06-04-2009, 01:20 PM
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i would say its a combination of both.........freshwater and newly found food...........Do you have somewhere for them to hide?..........a little cave or piece of wood they can swim under?.............Mine appreciate a few hiding spots in the tank.............They seem like to go in and out of the 2 little caves i made for them and they all hang out together
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post #3 of 5 Old 06-04-2009, 04:01 PM Thread Starter
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In this tank, the temporary one, they dont have any "full cover" type places to hide. They have decor they could use hide and there is a plant that kinda got mahed by the heater so it provide cover, maybe not enough though.But in there permanent home there is caves and heavy planting so that should help. Mine has two that hang together but one stays a little bit away, this one is also smaller. You think it might just be a male?


Snowflake - Crowntail Male ~ Marina - Crowntail Female ~ Kingdra - Delta Male

3 Bettas
3 Neons
2 Cories

2 MTS
2 Cats
2 Parakeets

1 Ghost Shrimp
1 Chihuahua
1 Goldfish pond
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post #4 of 5 Old 06-05-2009, 06:01 AM
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The 6 cory duplicarus i have in my one 90 gallon do hang out together, but i think i have 2 pairs that are always together and 2 loners who will hang with the other cories, but also go out and investigate the tank as loners........I wouldnt be suprised if i have the 2 pairs spawn in the tank.....I have 2 small caves and the 2 pairs are always hanging out in them..............I myself havent bothered to see if i can sex the 2 loners, i would think they are 2 males or 2 females..........Maybe another member could give you a tip on how to sex cories...........
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post #5 of 5 Old 06-05-2009, 10:00 AM
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Sexing corys isn't easy, and I have had them spawn. The females are rounder when mature. Watch their behaviour, and if you think they are in spawning mode, do a partial water change (40-50%) using water a tad cooler (stimulates a tropical rainstorm which is when they spawn in nature) and do the pwc on a day when there is a low pressure system outside. Fish can sense this (characins regularly spawn when bad weather moves in!), and again it stimulates them as it does in the wild. If you have male and female, they may spawn under this scenario if they are at all ready and mature.

Re the diatoms, no, corys will not eat algae. They will graze through brush algae looking for bits of food. They do not eat any algae.

They do often like to swim into the fresh water entering the tank during a pwc. I wouldn't take this as a sign of anything actually problematical with the existing tank water, though obviously it could be. Corys are sensitive to water quality and parameters, and they do not like significant changes nor do they like to be moved to another tank.

IonBaller007, was there a name on these corys at the store? Might give a clue as to what they are, as different species can behave differently or encounter different problems. How long have you had them, and are they still behaving as you described previously? What is your pH and hardness, and temperature (some corys cannot tolerate higher temps)?

Fishin Pole, lucky you...I think C. duplicareus is one of the nicest looking corys; I currently have one which is all I have so far found in the local stores. I had a group of them back in 1995 shortly after they were scientifically described and named (July 1995 FAMA) by Dr. David Sands who discovered them in 1992 in a northern tributary of the Rio Negro. A near-identical species was also discovered at the same time in the same river, and named C. serratus by Sands due to the serrated pectoral spine (C. duplicareus has a smooth pectoral spine). Of all the similar-looking species (C. adolfoi and its mimic C. imitator, C. duplicareus and mimic C. serratus), C. duplicareus has the brightest orange post-orbital fleck and the broad black dorsallateral band. A very impressive and attractive little fish.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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