Help with determining which ro/di unit is better

[Benhuan]

Hi all,
So up till today i have been buying my saltwater as well as my ro/di water for my reef tank. I want to move onto mixing my own water due to time issues with gonig to the LFS every weekend. I was wondering which of these ro/di units you reckon would be the best as well as if a TDS meter is nessecary ill add links for the ones im looking at right now (I live in sydney, Australia if that helps at all). My tank is around 75G. Im not sure the diffrences between a 4 or 5 stage is... any help will be greatly appreciated.
Thanks all!

4 Stage 100GPD Premium RO/DI System - Reef Pure RO Systems

Our 'Premium' range of RO/DI systems, across all stage variations, include all optional accessories as well as 2 x 50GPD RO membranes. These systems do require a minimum water pressure of 65psi. So, as long as the minimum water pressure can be provided, they will produce water twice as fast as...

reefpurero.com.au

5 Stage 100GPD Premium RO/DI System - Reef Pure RO Systems

Our 'Premium' range of RO/DI systems, across all stage variations, include all optional accessories as well as 2 x 50GPD RO membranes. These systems do require a minimum water pressure of 65psi. So, as long as the minimum water pressure can be provided, they will produce water twice as fast as...

reefpurero.com.au

Or 50gpd units

5 Stage 50GPD Essentials+ RO/DI System - Reef Pure RO Systems

The 5 Stage Reef Pure RO/DI systems are designed for Australian reefers who have tap water that is treated with high amounts of chlorine and chloramines, along with common levels of other contaminants. All Reef Pure RO/DI systems feature high-quality, Mixed Bed Colour Changing DI Resin stages...

reefpurero.com.au

4 Stage 50GPD Essentials+ RO/DI System - Reef Pure RO Systems

The 4 Stage Reef Pure RO/DI systems are designed for Australian reefers who have tap water that is treated with chlorine, some chloramines and have minimal levels of other contaminants. All Reef Pure RO/DI systems feature high-quality, Mixed Bed Colour Changing DI Resin stages for 0ppm TDS...

reefpurero.com.au

 

[Retro Reefer]

Knowing what’s in your source water is where you want to start, here in the states we can get reports of exactly whats in our water and what chemicals are being used to processes it.. IMO you definitely want a 100 gpd system but I would see if they have a single membrane version instead of dual 50’s.

a tds meter is a must but you don’t necessarily have to have one tied into your system, a simple hand held version will work fine to test your water..

 

[sfin52]

Definitely want a 100gpd unit.

 

[Gareth elliott]

Daily drinking water quality report

Every day, we produce a report to confirm that our water filtration plants and water delivery systems throughout Greater Sydney are performing as they should. It's your confirmation that you're receiving the highest quality drinking water. We also do water analysis so you can check pH balance...

www.sydneywater.com.au

This should help with whats in your water. Found an article that there was coal ash run off making its way to the Sydney water supply, but no idea of its voracity, or the areas effected.

 

[sfin52]

There are countless ways to set up an rodi unit. Some have a pre filter and 2 carbon blocks ro membrane and than di resin. Or prefilter, carbon filter, ro membrane, two di resins (separate anion beads and cation need di resin beads)

 

[S2G]

Hey I found something that may be helpful. Can this be an option for you? (Its a direct quote from another forum )

[Try PSI Water Filters.(https://www.psifilters.com.au/

A lot of Aus reefers use them, they are a good Business, good service and advice and special prices for members of MASA]

I personally think an dual inline tds meter is a must. They're fairly cheap. I run 1 sensor before my membrane and 1 after my DI. It lets me know when I need to replace my filters.

 

[Benhuan]

Hey I found something that may be helpful. Can this be an option for you? (Its a direct quote from another forum )

[Try PSI Water Filters.(https://www.psifilters.com.au/

A lot of Aus reefers use them, they are a good Business, good service and advice and special prices for members of MASA]

I personally think an dual inline tds meter is a must. They're fairly cheap. I run 1 sensor before my membrane and 1 after my DI. It lets me know when I need to replace my filters.

Yeah! I was reading up on it and decided with this

Psi-020b-Di-Gm 4 Stage Reverse Osmosis Low Waste 1.25 To 1

Certified Australian Standard AS 3497 wall mount 4 stage reverse osmosis unit with an De-ionization post filter, with 100 gallon/400 litres per day @50 psi, 150 GPD / 600 LPD @ 100 psi genuine Filmtec TFC Membrane. Premium quality housings.

www.psifilters.com.au

Thank you all for the replies, much appreciated. I hope all your reefing goals for 2020 end up a major success!

 

[45ZoaGarden]

The stages is the amount of filters it has. 4 stage has four filters. 5 stage has five filters. I would stick to one that is designed to purify water in your area. If your water is pretty clean, you could use a 4 stage. If the water is bad, you should use a 5-6 stage. I live in Florida where the water is heavily tainted. I run a six stage aqua fx system with two carbon filters.