Put in lava rock 3 hrs later all fish died??

[leventis72]

:cry: What Im thinking is heavy metals leeched out into the water.
I removed the four pieces now with a fishless tank:cry: what can i use to make sure when adding more fish i wont see them die right away.
Amm 0
NITRITES 0
NITRATES 20
PH 8.2
TEMP 78 CONSTANTLY
Please help me out here
Thanks

 

[dudley]

How long has this tank been set up?

Where did you get the lava rock from & how did you prepare it for the tank?

 

[IceH2O]

I had lava rocks in my canister filter for a long time as a biofilter and had no deaths.

Unless you put in contaminated lava rock I can't see this as a cause.

 

[gustavo85]

why is that pH high...you planned it to be that way?

 

[inkyjenn]

did you clean the lava rocks before putting them in the tank?

 

[Keboss]

Where I live, water right out of the well is pH 8 or just over.

 

[Blueiz]

A ph that high is OK. Sounds like the lava rock was contaminated.

 

[gustavo85]

wow...here the water pH is 7.4...interesting