i have done a lot of research and i am pretty sure that only these types can go w?guppies 1 Platy 2 Tetra 3 Paradise fish .. now i don't know hw big guppies get for i am new to this hobby if i had 3 guppies and 1 platy how many tetras could i have or ... would that be it .. if i have 3 guppies and some tetras could i get a platty