The current L-BTC<>USDt pool has an LP fee tier of 0.25%. When creating a new liquidity pool, the default fee tier is set to 0.25% by default, although it can be adjusted to as high as 1% or as low as 0.01%. Note LP fee tiers are immutable, and thus cannot be modified once a pool is deployed. Multiple liquidity pools could exit with the same pair (such as L-BTC<>USDt ) but with different LP fee tiers. The swap page in the Bitmatrix web interface algorithmically picks the liquidity pool based on the best price.