Let's see it Sean!!
come on, you can’t tempt an engineer with data and not offer the goods.
I have been collecting equipment over a long time. Some, I purchased with the intent to upgrade so it may have been overkill on my smaller systems. The equipment on my current tank is pushing $100/gallon. I include absolutely everything outside of livestock in that number though. Total over board and not necessary. This can be done for much much less.Have you done the math here?
$1000/40G= $25/g
For generosity sake, lets say $800/40g = $20/g
If you are not going to invest in an RODI unit, your ONGOING cost multiplies. Not only do you need to buy salt, but also fresh RODI water for water changes AND top offs.
Again, Let us be REAL about what this costs!!!