external fuge is bad ***... a pair of clowns in a bed of caulerpa, or other macro algaes.... or even xenia...
and i don't mean qt frag tank... i'm saying... like if you have all these frags, and if something goes wrong with your main DT, then something is going to go wrong with your sidehack frag tank... if it wasn't a sidehack, then you could frag all your corals, and save them in a different system...
this way is only good to get rid of FSM frag racks.. LOL...