Thank you; Cpt. Zissou and stinkyattic for the replies.

I got the Day off so I'm going to flush this morning and use the time to finish rewiring my revised grow space.
I should have taken more time in the planning phase then I wouldn't have to rebuild during a grow.
New set up adds 3' of headroom, 4' - 1' for tall 5gal buckets.
Thanks Again