ok so i have a 75 gal tank...just abt done with cycling..i have three shubunkin goldfish, one common goldfish and one common pleco kept in a tank with two gouramis. i want to move the goldfish and the pleco to my 75 gal since they need cooler water and more space. but i would like to know what other tank mates would be good to house together with the goldfish. also are two gouramis and 6 tetras good for a 20 gal tank?