Survival Help

[rick-fish]

Hi,
I'm new to the site but not to owning fish, i have a well established 190 litre community tank. my problem is i can't keep bettas alive. it's really strange. all my levels are exactly normal. I have 15 tetras 10 zebra danios 5 guppies, 2 clown loach, 3 angel fish and 5 ottos. yet every time i put a betta into my tank within three days it dies. just yesterday i put a new betta in. come home from work today to find it floating. I really don't understand whats happening. I feed my fish a range of foods because of the range of fish obviously. It goes from frozen brine-pellets-flake-algae wafers. even down to some cut up cucumber and cooked prawn. From what i've read on the internet bettas arent hard to keep and some are kept alive and healthy (albeit cruelly) in a 10 litre glass bowl on the side.
Tank temp is 26 degrees celsius.
After testing just now:
nitrite: 0.0mg/l
ammonia: 0.0mg/l
nitrate: 20mg/l
ph:8.0
At first i thought it was a dodgy fish. but today was the third betta i've killed Sad
Can anyone help?

 

[Forestpisces]

What other fish are in your tank bettas are not really a community fish.

 

[rick-fish]

I have 15 tetras 10 zebra danios 5 guppies, 2 clown loach, 3 angel fish and 5 ottos. thanks for the response

 

[Forestpisces]

I have 15 tetras Are known to nip bettas and terrorise them in some cases
10 zebra daniosCan stress the betta as they are fast swimmers
5 guppiesThere is your main problem NEVER mix these fish with bettas as the bettas exhaust themselves by chasing them due to their colourfull tails and when the betta is worn out they will terrorise him,
2 clown loach,These need a larger shoal and grow quite large
3 angel Will terrorise your betta and eventually eat small tetras as they are there natural diet in the wildfish
and 5 ottos.Not an issue but need algae to eat and dietry suppliments thanks for the response

Sorry for the bad news but that tank may well turn into a disaster and is certainly not suited for a betta.

I can advise you to some extent about your tank size and stocking and if you wish to keep a betta then i can advise you about almost everything you need to know

 

[rick-fish]

well that would make much more sense. would appear i have every fish thats harmful to a betta!
I'm in the process of buying more clown loach, just waiting for local lfs to get re-stocked.
Guess i'll be without a betta in my community tank then

 

[Forestpisces]

WHat size is your tank and what tetras do you have?

 

[rick-fish]

it's 190 litres and they're the bog standard neons thanks for your help

 

[Forestpisces]

Your tank isnt big enough for the clowns and the angels will eat the neons