as of right now, you are so overstocked its not even funny the general rul is 1 inch of fish per 1 gallon of water, the mollies i beleive grow to be 2-3" each, the tetras 2" each, the sword tail i think is around 5", so you've got 21 inches of fish in a 5 gallon tank, im sorry to say that you'll either HAVE to get a bigger tank for your fish, at least 30 gallons, or take all but 2 back including the sword tail, a pleco can grow to be around 15-20"
Clown fish lady ... unfortunately, you were lied to at the fish store. 99% of the people at fish stores do not know the basics of fish keeping such as Cycling as well how many fish (and what sizes of fish) one can put into a tank of this and that size. Your tank is indeed very overstocked right now, and I'd advise you not to get anymore fish. A Plecostomus needs at least a 75 gallon tank, so this fish is very out of question.
For the current list of fish that you have, you need at least a 15 gallon tank in my opinion. If you want to add another platy to it, a 20 gallon tank would be better. As I've said before, a Pleco is out of question for even a 20 gallon tank, not to mention a 5 gallon tank.
thank you for the info no we havent gotten it yet your post has stoped us. this tank is our starter tank we are hoping to upgrade to a much bigger one we are now hooked ;Dnever knew how fun it was to have one now we love it. ;D going to check out the other links you have posted for me thanks agian for the help. your a life saver.
Please upgrade to a bigger (I'd say at least 15 gallon, 20 even better) tank asap. Most of the fish in there are either too big or too active for that small of a tank, and it is way to overstocked for the fish to be comfortable and to maintain good water quality. Your fish will be a lot happier in a bigger tank.