Desperate Need Of Help

[lauramikks]

Bought my first betta on sunday all was fine then on tuesday he died took him back to fish shop with a sample of tank water nothing wrong water really good, gave me replacement then today second betta dies with white stuff round mouth and gills.
What do i do? would a disease not show up in my tank water when tested do i take another replacement from them which i dont really want to as cleary something is wrong

 

[ZoddyZod]

we will need a bit more info here, please complete the form linked below and post it back in this thread.

http/www.fishforums.net/index.php?/topic/2330-please-read-before-posting-to-emergency-section/

 

[lauramikks]

1. Water parameters. (ammonia, nitrate, nitrite, PH, temp', Hardness etc) all checked at lfs all very good
2. A full description of the fishes symptoms. white fungus round mouth spread to gills erratic swimming at top of tank
3. How often you do water changes and how much.weekly change and clean 20 percent.
4. Any chemicals and treatments you add to the water. nothing
5. What tank mates are in the tank.8 corys
6. Tank size. 10 gallon
7. Finally Have you recently added any new fish? on the bettas that have died

 

[fidjet2]

If possible we need the exact water parameters. Get your LFS to right them down for you or if possible, it would be great if you bought your own liquid testing kit.

 

[lauramikks]

Ok am going to go back, is it poss that its cotton mouth what ive read sounds like it is, will i have to shut my tank down.