Add a checkbox on the "tip" page to render ASCII character for the tip amount.
ASCII tipping can show up like this:
nicefish TIPPED "C" CORAL FOR THIS POST
nicefish TIPPED "O" CORAL FOR THIS POST
nicefish TIPPED "C" CORAL FOR THIS POST
nicefish TIPPED "K" CORAL FOR THIS POST
nicefish TIPPED "S" CORAL FOR THIS POST
Maybe a tooltip over the letter to see how many coral it was.