hi im new to this. im currently just started back up with a 10 g and some neon tetras and balloon mollies. but were getting a 70 g tank friday and my bf wants a ropefish. i want a tiretrack eel. now i know ropefish are escape artist and ive done some reasearch. but i want to put a ropefish and a tiretrack eel in the 70 g and i want something else to go with it. not huge bc i dont want to overcrowd but bigger than thier mouths. do yall have ideas?