Join Date: Aug 2012
Location: Ann Arbor, MI USA
I would say no not initially until you know what you nutrient uptake looks like.
Early on I would say testing is your friend. After few weeks of EI and stable plant load you will have a fairly good idea of where your nitrates are running throughout the week. Depending on your dosing level you may or may not need the large end of week water change to "reset" the tank. This determination would be hard to make early on without testing.
Play it by ear, you have a huge system there which will inherently give you a little more stability. EI, while awesome, was not handed down on high to be followed by the letter. Tweak it, adapt it, experiment with it. It makes it fun.