Aeration

I'm kind of new around here,but,I use 4ft rubber oxygen hoses that are laid down in the channels of my 4.5ft by 4.5 grow tray.When the pump comes on to fill my ebb and flo It looks like a hot tub with so many bubbles! Use it if you like,It works for me!Oh, I also have a water pump and two arriation stones going 24/7 too in the res.Prospector

IMHO
running air 24/7 is the only way to go,given what happens without air:(, a submerged pump with magnetic drive is far worse at pulling the Fe from the nuits.besides I think the bubbles help stir things up a little

there is plenty of Fe in most ferts.if not change brands. but that is one of the reasons for changing nuits. on a frequent/regular basis.