I highly recommend you to mine on Suprnova pool. it is very stable.
Suprnova is bad pool. I cant login month there. Support dont answer. I lost 1800 btcz.

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I've mined many coins on suprnova, NEVER had a problem, NEVER lost a coin.....
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Congratulations, but now I constantly have an error "Unable to login: Account locked. Please Check your Email for instructions to unlock." Support no answer...
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Go to
https://unlock.suprnova.cc