Ok, I am looking to get around 3 CA/SA peaceful and in the 6-10" full grown range with some plants driftwood, and a school of Corydoras Aldolfoi (i hope i spelled that right.) They will be housed in a 75g, with larger sand grans. I want colorful and medium size i would say. I also want a medium school of tetra. What fish, and filtration should i go with other than a wet/dry/sump?