yeh the little guys tail is not looking too healthy. i don't have many fish in there yet, still a beiginner

just have 4 neon tetras (there were 6, little guys have my heart broken!), the 2 platys, 2 chinese algae eaters(i think, golden ones, were called golden sucking loaches in the shop), 1 male guppy and one african dwarf frog. its a 15 gallon tank. i dont have any live plants in there yet, waiting on my stupid pet shop to order some.
they were tank mates before yeh
ps nerdguy your guppy is lovely, i cant wait to get more of them. was just tryin to take a pic of mine to show ye but he wont stay still!!
the bigger one is probably twice the size, lil guy hides out in the bog wood a bit but he seems to be hangin around the surface a bit now. every other fish in there is really healthy, the bully (mickey mouse) is not going for the guppys tail at all. weird huh?