Fixed!

https://tsl4pa.dm2301.livefilestore....DI3.jpg?psid=1

That is very detailed. Kudos to you for keeping such fine notes.
I have a question on your math.
In my opinion, what I remember from high school, the ratio 1:4 means, in this context, that for every one gallon of ro/di you make, you waste 4 gallons down the drain.
So I question you multiplying your final gallons by 4, should that not be multiplied by 5?
But I could be wrong, high school was very many years ago.

I'm multiplying by 4 and adding 1 ((D53x4) + D53), so I guess the same as multiplying by 5? It's just easier for me to visualize the 4 of waste and adding the 1 of pure water produced. D53x5 would be a simpler formula. I'm no math expert either though. Took a lot of trial & error and as you see, I had to make a correction today. I forgot to add the cell with correct formula for total throughput for the new carbon block when I created a new RODI sheet after changing the carbon filter.

lol
yes of course that will work
I didn't do the math, I just read the write up
My bad
You are doing a fine job

I just started drinking the ro water from my aquasafe rodi n it tastes weird. But it's still 0ppm. Does this mean I should change the prefilter?

And yet people still ask if they really need to use RO :) I guess you don't, if you don't mind that "sludge" in your tank!

Do you drink RO from any other sources? Bottled water? It might just be lack of chlorine that tastes weird. If it tastes weird compared to a commercial bottle of water, I'd change the carbon.

Good eye on the write up part where I don't mention that I also add the produced water as is evident in the formula! That's what happens when you don't proofread long, anal posts before you submit them and assume folks will look at the pretty graphics with formulas! Either way, I made an assumption and error in the write up. I did proof read a ton of times, but it's a long post & I goofed.

Not to hyjack this thread too much,... Jason, you should be drinking the water from a tee before the DI part.

Yes I unhook the DI part so it's RO only. It kinda tastes like swimming pool water(yes I suck at swimming lol) or tap water that u put in a plastic bottle and left in Ur cars for days. I think I'm gonna change the carbon like aquattro advised. Dunno how my fishes stand it lol