Extra RO/DI Cartridge Suggestions

[Juslen]

Good morning fellow reefers,

Two nights ago my old Puratek RO/DI unit began to smoke and parts of it gave up making water; it produced water at a 1:0 product water to wastewater ratio. Incredulous, I figured it was probably due.

I got another RO/DI unit from another reefer, and they threw in two extra cartridges for media filters. Long story short, my question is, how can I maximize the 4 stage RO/DI unit I have already (sediment, carbon, DI resin, RO membrane) with the additional two cartridges I have? Should I even bother? I remember AZDesertRat mentioning how additional stages aren't necessarily better. It's a 200 GPD pump, and I have no discernible pressure problems if that factors into anything.

 

[C. Eymann]

What are the micron sizes of your current filters? I'm assuming by cartridges you mean two extra filter housings?

 

[Juslen]

What are the micron sizes of your current filters? I'm assuming by cartridges you mean two extra filter housings?

Yep, two housings. The sediment filter is 1 micron and the carbon block is 5.

 

[Heabel7]

I would add a 5 micron to the front for increase sediment capture, before a 1 micron to start the traditional 4 stages. Then do BRS pro at the end with additional anion resin. Or if your water is already fairly sediment/rust free I would go full pro on the back side. With cation, anion, mixed bed resins. It has saved me a bit of cash getting more time out of my resin. If you haven’t watched the BRS series on resin effectiveness. I would give it a go.

 

[Juslen]

Thanks for the advice! I just checked my carbon and turns out I got a half micron block

 

[lapin]

I use 2ea 1Micron sediment filters before my carbon. Then 3 resin after the RO.