Help My fish are dying

HI
I have a 30 gallon tank. I bought a fish from a guy and since then my
tank got all screwed. I did a water change but all my fish are dead
except for the two clwon fish. I tested the water and here are the
results.
Ph 7.7
Ammonia 0.3
KH 300mg/l
Nitrate 0mg
What do I need to do to keep my two clown fish from dying and bring my
tank back to normal. The clowns are lying on the bottom no moving
alot.

If someone can give me some guidance, it would be greatly appreciated.

G

gman wrote:

HI
I have a 30 gallon tank. I bought a fish from a guy and since then my
tank got all screwed. I did a water change but all my fish are dead
except for the two clwon fish. I tested the water and here are the
results.
Ph 7.7
Ammonia 0.3
KH 300mg/l
Nitrate 0mg
What do I need to do to keep my two clown fish from dying and bring my
tank back to normal. The clowns are lying on the bottom no moving
alot.

If someone can give me some guidance, it would be greatly appreciated.

G

Water changes for the moment, more filters will help with bioload if that
is an issue.

Aside from your tank not being cycled, I haven't read anything that
would cause mass death unless some disease got out of control in your
tank.

How many fish did you start with? What kind were they and what did they
die from?

I apologize for the obvious questions, but...

Did you have aeration in your tank and a heater? Are you conditioning
your water?