I've done the searches & read the threads on this topic but it seems that every tank is different so I'll ask again. I've got a 225g 72Lx30Wx24H tank coming with a center, internal overflow. I will be using a TS48 kit on this tank. The tank will be bb. I'm thinking I'd like to have 2 large islands of rock which will allow for siphoning on all sides/front/back of the tank and good water movement. Where is the best place to put four 6100 streams? I was thinking about putting them all in the back corners, two facing forward, two facing towards the middle along the back pane of glass. I will have the magnets for mounting them. Can they be angled or can they only point perpendicular to the glass?