one of my acf's has a swollen finger ,and one side of it looks really red like blood under the skin its been like this for a while now. i thought it was because the water was dirty (55 gal missed last summers cleaning and had lots of algie and little tiny worms all through it) so i cleaned out the 55 gallon and i have them in a small critter container changing the water every couple days or so to try to get rid of the worms, and i thought that it would just get better by its self but its still the same size as it was. i dont know what else to do ? im afraid to use any medicine because theyre frogs. i dont know if it has any thing to do with the other frog but one of my other frogs is rather skinny although i make sure to feed each of them the same amount more or less hes still acting the same so i dont know if any thing is wrong please help ive had these frogs for 4 or 5 years now i dont want to lose them