the 5 silver dollars are about 3-4 inches - the major reason for me getting the 55g was because the 29g was too small and now I have to go bigger, those little buggers, the only reason I'm getting overstocked is because of my fish rescues

the platies I got from another tank I bought and the khuli loaches I got from my crazy fish friend who gifted them to me when my
GSP died

and the 4 guppies were originally feeder fish for my GSP but he didn't eat them and since they survived I transferred them into my 55g.
I think it may be the 2 platies as well, I've never had plant issues with my silver dollars, as
BadWolf said, they are bit more of meat eaters because when I feed them the dried shrimp they gobble them up right fast, looks like little pink footballs stuffed in their mouths lol but I'm not ruling them out.