Was gonna get out of fish but some luck happen so now I am up to the sump issue and I need to know what size pieces of glass i need for my sump I want a refuge spot i have a asm g3 skimmer. it is a 75 gallon tank one 1 inch hole for drain return is 3/4 and the return pump is a mag 9. let me know what size glass and if i need to place a t and return some of the water back into the sump from the return being to much.