blackish scales on Rose.

[Little Leaf]

Originally Posted by Sakura8

In this case, the cycle isn't going to help. The only way to control the amount of waste being produced is with large water changes. In an ordinary tank though, I would agree that a large water change isn't helping.

my dad sometimes does the changes without my permission and questions like "how much water should I remove?" T.T

[LittleBlueFishlets]

Originally Posted by Little Leaf

my dad sometimes does the changes without my permission and questions like "how much water should I remove?" T.T

Can you teach him how to do a water change correctly? It's actually good that he's trying to help with these. It shows that he's trying to help out. Maybe you could write up some water change instructions for him?

[Little Leaf]

Originally Posted by LittleBlueFishlets

Can you teach him how to do a water change correctly? It's actually good that he's trying to help with these. It shows that he's trying to help out. Maybe you could write up some water change instructions for him?

hmm... okay

[Little Leaf]

UPDATE:

Rose has 3 or 4 black scales and more "fuzz" on her gills. there is also some black scales on her head and the fuzz is reaching to her belly. she also looks as if she has been slightly burnt. (but the temp isnt high right now, its at 82 Fahrenheit and none of the other fish seem to be acting like Rose)

(PS. the black is more like a gray from the lead of a pencil shining in light)

[Little Leaf]

wow, no one is paying attention. I feel like everyone hates me :S

[LittleBlueFishlets]

Does the 'fuzz' on any of these fish look like what Rose has?


http://www.flippersandfins.net/flexibacter.htm


http://www.tropicalfishanswers.com/columnaris/


http://www.petfish.net/articles/Diseases/columnaris.php

[Little Leaf]

Originally Posted by LittleBlueFishlets

Does the 'fuzz' on any of these fish look like what Rose has?


http://www.flippersandfins.net/flexibacter.htm


http://www.tropicalfishanswers.com/columnaris/


http://www.petfish.net/articles/Diseases/columnaris.php

looks a bit like velvet fuzz but it isn't shiny

[Sakura8]

The best thing I can advise is for her to be isolated in her own 1 gallon and away from the other fish. She's probably very stressed.

[Little Leaf]

Originally Posted by Sakura8

The best thing I can advise is for her to be isolated in her own 1 gallon and away from the other fish. She's probably very stressed.

so... what disease is this? and what is with the gray-black scales and fuzz?

[callistra]

We can't really say more than has already been said without photos.

You should inform your dad that your stock needs a minimum of 10 gallons and your schooling fish need a minimum of 5 each, but 6+ is better. Also the danios and guppies are cold water fish and you can't keep them in a tropical aquarium like that.

You can't keep healthy fish like that. Sorry. They probably need antibiotics, but the only way to keep them alive and healthy long term is to adjust the above.