yes, but you should humor me and add a small 45 peice somewhere for sheer movement, im not saying its wrong. it will be fine for a 75 gallon. im not trying to be mean, just because you added more doesnt meen its stranger. now aht you have done did make it a ot stronger so good job. but between 2 of the upright 2x6's (preferably in the center so you dont see it) put one from the top of one of the 2x's to the bottom of the 2x beside it. its not needed but i would rather overbuild