If Kevin would have talked about that his book would have been more valuable. He says nothing either way about air pumps or using air venturi on power heads. Re big tanks. I finally got my dream of two big tanks. I love the depth for tall plants but no matter how tall the tank is there will always be some plants that want more height.
Tall tanks can be a bear to work on.
My arm pit and ear do get wet at times if I have to reach too far. It requires getting on a ladder to reach down low enough. Had early problems of blue green algae but followed the Sears recommendation on PMDD etc and have the P down to where there is no longer any cynobacter algae and very little of any algae.