# Base, Meta and Factory Pools

Ellipsis has three types of pools:

1. Base pools: `3EPS` (`BUSD-USDC-USDT`), `btcEPS` (`BTCB/renBTC`)
2. Meta pools: for example `[fUSDT, [3EPS]]`, `[DAI, [3EPS]]` or `[TUSD, [3EPS]]`
3. Factory pools: permissionless pools that can be created by anyone. These pools can be meta pools or plain pools, and can contain stablecoins, pegged `BTC` or `BNB` and can contain anywhere from two to four tokens. 

{% hint style="info" %}
Factory pools, being permissionless, can be created by anyone or any team. Please be sure to understand the assets in a factory pool if you are going to provide liquidity or trade in the pool.
{% endhint %}

Meta pools allow for one token to trade with another underlying Base pool. In this example users could seamlessly trade `fUSDT` between the three coins in the `3EPS` pool (`BUSD-USDC-USDT`). This is helpful in multiple ways, including:

* preventing dilution of existing pools,
* allowing Elipsis to list less liquid assets,
* providing more volume and more trading fees for liquidity providers. 

A Meta pool consisting of `[fUSDT, [3EPS]]` would contain `fUSDT` and `3EPS` LP tokens. This means that liquidity providers of the 3EPS pool who do not provide liquidity in the `[fUSDT, [3EPS]]` Meta pool are shielded from systemic risks from the Meta pool.