For all of those I would suggest a 55.
For the cave tetras what I'm going to do is do the styrofoam backround and on alot of the sides, with lots of rocks. Then I am going to get a glass top, and spray paint it w? krylon fusion except for like two or three holes. Thus creating cave lighting, you know how theres just a couple sparse light rays.
Good luck keep us posted
For the cave tetras what I'm going to do is do the styrofoam backround and on alot of the sides, with lots of rocks. Then I am going to get a glass top, and spray paint it w? krylon fusion except for like two or three holes. Thus creating cave lighting, you know how theres just a couple sparse light rays.
Good luck keep us posted