Finally finished (kinda of) the frag tank... A biocube 29g, with 4 t5s at 8 inch from water.. the light stand is not a work of art yet (just a temporary solution) but will be making a better one soon. The rocks are just temporary to hold some stuff in place for now... So, a question now.. I am thinking on making the back of the tank a refugium (just some algae as I saw some people doing). Is it a good idea? Should I use bioballs to help with bacteria? I also have a skimmer and a carbon reactor in it (Will use gfo and carbon in it). Any thoughts and tips is highly appreciated on this, specially because is my first frag tank. Thanks everyone!!!