RO/DI question

Hello,
I recently move to Cape Coral, Florida. I am on a well but I had a whole house RO system installed. The company that installed my whole house system says that they can sell me a large DI which would guarantee that my water has 0 TDS for 300-400.00. It would make water much faster than using my Reef RODI. If water is run through a whole house RO and then a DI = 0 TDS does that = safe water for my reef tank? Does anybody have a whole house RO with a DI attached? (I just bought a booster pump for my Reef RODI but I am having trouble with my outside electrical outlets-I've already checked the breakers-so I currently cannot use my booster pump.
Thanks,
Jim

75 gallon Reef tank 70 lbs of live rock,54.5 pounds of base rock, 60 lbs live sand, 1 Clarks clown fish, 1 yellow watchman goby with pistol shrimp,1yellowtail damselfish,2 Skunk Cleaner Shrimp, 2 Emerald crabs, 5 drawf hermit crabs, and 4 Nasser snails, 5 Bumble Bee snails, 4 Turbo snails, Sebae anemone, Kenya Tree forest, 1 Yellow Polyp, 1 Mushroom rock, 1 White Spot Star Polyp, 2 button polyp rocks, 1 Pineapple Coral, 1 Favio Brain Coral, 1 Bubble Coral, 1 Xenia Coral, 1 Frogspawn coral, 1 plate coral, orange button polyps, purple button polyps

 

It would make your water Reef ready, but not advisable to drink. I'd stick with your separate RO/DI for your tank.

 

I realize that it would be unsafe to drink but this would be a seperate connection just for making reef water. Glad to hear it would make it reef ready.
Thanks,
Jim

 

Agreed. Your body needs some minerals that are present in natural water. Over time drinking RO/DI could lead to mineral deficiencies if you don't make them up some other way.

 

TDS is king. If it reads zero (or close to it) then you're good to go.