I got my dojos for about 4.99 a piece.
Your tank sounds like a loach wonderland

They'll love it.
As far as sinking pellets, I am not entirely sure, however freeze dried foods will be fine however they do love live food.
__________________
"By avoiding the very thing you despise the most, by trying to be "different" by striving to be so "unique", you've become the sole and center of all that you held so high on the pedestal of disgusting mortality deemed society."