RO/DI Units vs DI Only?

[reefburnaby]

Hi,

TWP is fine as long as you use the top off with kalk. If you are planning to use TWP in water changes...then you'll need to be more careful. TWP is really good with the first 50 gallons of water, but it slowly gets worse. The flow rate through TWP is really critical...slower is better.

RO/DIs are a lot better since the flow rate is controlled by a restricter. ROs are good at removing 90% of the bad stuff and the DI removes the remaining 10%. Its nice to have and saltwaterconnections had a sale on some good units. Since you have a TWP (DI), then all you really need is a RO to make a RO/DI.

- Victor.