RO or RO/DI ?

[zoomin]

I bought a 4 stage RO filter for my aquarium water and drinking water.

Does the deionizor make a difference for aquarium top-up water or is RO enough?

[DanG]

Do you have a tds meter? With RO/DI you should be around 0-4ppm, I'm not sure what it would be for just RO.

[zoomin]

The place where I bought my RO unit from had a spigot with a little light and built-in TDS meter. It's supposed to turn on to let you know when your TDS rate gets above a certain level and then you know it's time to replace consumables.
The guy helping me out told me that in Victoria this is a waste of time because regular Victoria tap water tests at 0 on a TDS meter.

[muck]

Originally Posted by zoomin

The guy helping me out told me that in Victoria this is a waste of time because regular Victoria tap water tests at 0 on a TDS meter.

I'd go somewhere else to purchase the unit then as obviously the guy knows squat about what he is selling..

[zoomin]

I think he must have been referring to that particular TDS meter built into the spigot. Probably garbage without a very sensitive scale or something.

[TheReefGeek]

I would get a tds meter from www.jlaquatics.com

Install it, check your ppm for RO, then for RODI, and decide from there.

If you have an RODI, then I would use it for the reef, but for drinking water you need to use just RO water.

[Aquattro]

Originally Posted by zoomin

The guy helping me out told me that in Victoria this is a waste of time because regular Victoria tap water tests at 0 on a TDS meter.

That's wrong. I usually read around 14-17 ppm on my tap water....

[zoomin]

My 4-stage has 4 canisters; a mecahnical pre-filter, two identical carbon cartridges and the RO membrane canister horizontally on top.

I think I will add on the DI to this.

Thanks for the good intel.

[TheReefGeek]

You probably don't need the duplicate carbon, but I guess it can't hurt.