please help with iridescent shark

[pallen220]

ok I am very new to "fish tanks/ fish".

I have 2 iridescent sharks and one is fine but the other one is acting weird.

It will lay on the bottom upside down like its dead then swim up, then just fall., very inactive, swimming upside down, weird not normal things, the other one is fine and they both have been it there for about 2 months.

Thanks for any help.

 

[Lupin]

to MFK!

Please provide more details.

1. What is the size of your tank?

2. What are your water parameters? State the brand of test kit used.

3. Is your aquarium set up freshwater or brackish water?

4. How long the aquarium has been set up?

5. What fish do you have? How many are in your tank? How big are they? How long have you had them?

6. Were the fish placed under quarantine period (minus the first batch from the point wherein the tank is ready to accommodate the inhabitants)?

7. What temperature is the tank water currently?

8. Are there live plants in the aquarium?

9. What filter are you using? State brand, maintenance routine and power capacity.

10. Any other equipment used (aside from heater and filter which are two very important components of the tank)?

11. Does your aquarium receive natural sunlight at any given part of the day? What is your lighting schedule (assuming you do not rely on sunlight for our viewing pleasure)?

12. When did you perform your last water change and how much water was changed? How often do you change your water? Do you vacuum the substrate?

13. What foods do you provide your fish? What is the feeding schedule?

14. What unusual signs have you observed in your fish?

15. Have you treated your fish ahead of diagnosis? If so, what treatments did you use? State your reasons for planning ahead of proper diagnosis.

More information here.
http://www.monsterfishkeepers.com/forums/showthread.php?t=210102

 

[Trixsharks88]

i have about four of them and my biggest (about 9in) when he was little he used to lie on the bottom all the time but once i got him in a school of them he started swimming and eating like you would not believe.

1. maybe needs a few more members in his group.
2. depending on what size tank its in it might not be swimming because the tanks to small.
3. sometimes its just the iridescents pesonallity but youll notice as it gets bigger it will start swimming more and more.

 

[amv123]

i had one that would play dead when he got scared. when i first got him and put him in my tank he swam around strange and would lie at the bottom motionless and at times he would sit in floating plants and look dead. he wouldnt eat for a few days and finally started to act more normal and began to eat a ridiculous amount. so my point is they are a fish with a really odd personality