Guppies in 29 Gallon?

good choice of fish first of all. the pleco that you want is great but if you want you can have 2 because those ones dont get too big. you can probably get like 10 guppies 5 male and 5 female and they will get along fine. normaly male guppies look more colorful and have a bigger tail so that females are attracted to them. good luck w/ your tank :)