Whats Wrong With It?

[artpupil.ashu]

i attach pic of my molly fish. something was wrong with it. today morning it was fine when i came back and saw my black molly fish become half white and its feathers was spread at the bottom it cant even swim i put her in breeding box . after a hour it died. something was wrong with her. i want to know what was that prob? 

 

[WILDER]

Was the white on her fluffy cotton wool texture if so columnaris.
 
Sorry for your loss. R.I.P.

http/nippyfish.net/sick-betta/cotton-wool-disease-flex/

 

[attibones]

Can you give us some more information?

What size tank is this? What's the temp? Any tank mates?

Can you provide ammonia, nitrite, and nitrate numbers?

How long has the tank been set up?

Can you be specific about the fish's symptoms?

What do you mean by "feathers"?

 

[artpupil.ashu]

size of tank is 10 gallon and i put heater at 26 degree Celsius . tank mate is 2 other black molly 1 platy 1 sordtail, 2 blue gourami ,and 2 rose barb.
i dont know ammonia, nitrite, and nitrate but i changed 50% water 4 day ago and also cleaned filter . tank is 1.5 month old. and here feathers means her skin u can see at the bottom of breeding box.

 

[attibones]

I'm going to say whatever issue she had has something to do with the fact that none of the fish in your tank are suitable for a ten gallon and it sounds as though your filter is not cycled. 
 
Invest in a liquid test kit as soon as possible and do a 100% water change immediately. Rehome as many of your fish as you can. Platy need at least fifteen, mollies around thirty, dwarf gourami around twenty, rosy barbs need about four feet in length, I think. 

 

[WILDER]

Are the mollies all females?
Gourami need larger tanks of 15, to 20 gallons.
Also I think rosy bards need to be in  larger group 3 to 6 to help with aggression.
 
Take a sample of your tank water to the LFS and ask them to write the readings down for you.
For now plenty of water changes.

 

[artpupil.ashu]

no 1 of them is male molly. my shopkeeper said that if u regularly change water then ur fishes will die, do only 1 time in a month with geyser water after cool. i think he was wrong  
can u provide the list of fish which is suitable for 10 gallon tank

 

[attibones]

Yeah, your shop guy was very wrong. Most of us do one water change a week. I do two a week in my largest, daily water changes in my smallest, and once a week in my ten gallon. 
 
If you can move out all the fish you've got, you'll want to first properly cycle your filter. Either of the bottom two links in my sig will help you with that.
 
Later, you'll be able to add guppies (males only, as females will overstock you because of babies), endlers, a betta, pygmy corydoras, dwarf puffers, least killifish, microrasboras, and the like. You'll want to take into consideration that most schooling fish are not appropriate for this size tank because having a full school will overstock the tank. However, pygmy cories and microrasboras are small enough that you can have a few in a tank this size.

 

[artpupil.ashu]

thnk u vry mch buddy. can u tell me the concept of change water with geyser water after cool. why he suggested me to do this.

 

[attibones]

Well, you should not have to change with geyser water. Your tap water shoul be adequate. You should remove as much of the water as you can after moving your fish to a bucket of tank water. Using a siphon is the easiest way. I drain my water out my window and into the garden. Be sure to turn off your heaters and filters so thy your equipment is not damaged during the water change. Then just fill a bucket with fresh water brought up to the desired temperature. You want it as close to the temperature of the old water as possible. Then dose with a dechlorinated such as Seachem Prime or comparable. Use enough to treat the whole tank because you are changing most of the water. Pour the fresh water in, repeat as necessary to fill the tank, turn your equipment back on and then net and add your fish.

 

[WILDER]

Keep a look out for cotton wool patches on body, mouth area on remaining fish,