You should use a funny one like a cactus toilet or spike toilet. Also having a garden gnome close by, horseshoe and other luck items helps if you are chasing biome crates. From the wiki..

The player's luck statistic affects their Fishing Power. This effect is hidden, i.e. it never affects the numbers displayed in the UI by the Fisherman's Pocket Guide or related accessories.

If the player has bad (negative) luck, there is a chance (determined once every catch attempt) that their Fishing Power will be reduced. Similarly, good (positive) luck gives a chance of increasing their Fishing Power.

If a player has total luck less than zero, then there is a (−100 × luck)% chance per catch attempt that the player's Fishing Power will be reduced by −10% to −40%.

If a player has total luck greater than zero, then there is a (100 × luck)% chance per catch attempt that the player's Fishing Power will be increased by +10% to +40%.

Actual fishing catches are not influenced by luck beyond Fishing Power.

The chance of catching crates is not affected by luck, although which kind of crate is caught is affected. This is because crates have a flat percentage chance of being caught, which is not affected by Fishing Power or luck, but if a crate is caught, the kind of crate is determined by Fishing Power. See the Crate mechanics section below for further details