Sounds like you've planned well, good luck. Tell us more about your system, size etc and whether you plan on running a sump and so on. Also check some of the tank build threads. One of the members here, Myka, has some excellent links in her signature with information on starting a tank, cycling etc. Here's a link to her 90 gallon build thread, as mentioned, the info links will be at the bottom of any of her posts in her signature area.

http://www.canreef.com/vbulletin/showthread.php?t=52501

Thanks again. I have already read those links =)

Your doing fine. Keep up the good work and the reading

I checked at the LFS and they charged 45cents a gallon of RO/DI water. So about 40 bucks for my 80 gallons. If the DI unit is only $40, I might as well invest in one. How much would a good one cost, what brand should I look for and how would I hook it up to my house's drinking water? Some more info would be great!

Is the DI part of the process just another filter? I was planning on buying a single canister and putting a DI filter in it after the water has passed through my RO filter. Is this how it is done?

Yes thats how it is done. Add a T anywhere before the tap at the sink. Add the DI
Good to go. Water for the aquarium

Definitely on the right track. A housing, DI cartridge, some tubing and a John Guest tee should do it. Try to get a refillable DI filter, it will be a little more cost effective than the throw aways since you'll be able to buy the DI beads in bulk.

http://www.buckeyefieldsupply.com/sh...ory=39&Sub=127

http://bwiplumbing.com/ca/index.php/...cartridge.html

Nice. Thats exactly what I needed to know.

Does anyone have experience with the one in the link above? Know of any better deals?

Thanks guys.

Just threw those links in for info. I purchased my system from BWI, no experience with Buckeye. BWI may be shutting down their online business, the owner got busy with other ontracts or something. Here's another link, to BRS, they seem to be a popular vendor and sponsor here as well I think. Again, no personal experience but I've heard good things.

http://www.bulkreefsupply.com/RO/DI-..._97/index.html