Hi everbody sorry for not giving details its going to be 300 gal, filtration will be 2 eheim pro III 2080 and the fish will be hasp and peacoch with 7" max size, i do have some experience ive kept a 55 for about 12 years mainly firemout,cons,jewel,silver dollars with 50% water change twice a week so im redy for upgrade just want to get it rith the fist time so i come to the experts tanks in advance for the help