ah, ok. Is a POS/Pow system. This is a iittle bit different. Possibility of do pos using pos pools?
Yes, you can use pools in Ethereum Casper.
The minimum amount to stake is 32 Eth (quite a lot of money). So, you can join some pool to receive stakes of small quantities of eth. You can read more about it here.
https://www.coindesk.com/3-ways-staking-will-upend-the-economics-of-ethereum