Food for bottom dwelling fish

They are Bristlenose Plecos, so they are mainly vegiterian.

What kind of plecos? For algae eaters, algae wafers are great, if it is more of a carnivorous species, larger size spectrum works well.

Get some algae wafers,  or tie a small rock to a pice of zucchini.  Plecos go NUTS over them.  Other fish will eat at it too.  And a word of warning on the algae wafers..........there is a LOT of food packed into those things.  I dropped 7 in a tank with 24 litle BN plecos and some other fry.  The tank looked like a dirt bomb went off in it later that night  .  Had to do an immediate 50% WC,  and another 2 days later.  So start with small amounts until you get a good gauge on what they will consume.

I need to get foods to float to the bottom to feed my Plecos.  How would I sink them?  Any help would be appreciated.