What pool can I use for mining Bitcoin? I tried AntPool and ViaBtc and in both cases I get warning that pool difficulty is lower than minimum allowed. There is a list of recommended pool on the NiceHash site, but they are mostly for altcoins (like Suprnova). There are no popular Bitcoin mining pools in this list.
You can try ghash.io or p2pool.Personaly i test ghash.io and no problems.