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First RODI setup

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Hi All,

So, I’m planning to make my own RODI water and then mix into saltwater. I have space in the garage next to a tap so it’ll live there and I have some shelving that may hold the storage tanks too.  I only have a Reefer Nano which has a total volume of 105 litres. I’m new to marine (had the Nano just over a year now) so RODI systems and mixing saltwater is all new to me.  I’ve done a bit of research and this is what I plan to get so far:-

RODI system - https://www.osmotics.co.uk/products/Ultra%252dPure-4-Stage-150-Gallon-Per-Day-RO-System.html
I was going to get 75 gpd but would like to get a second and larger aquarium in the future plus it’s only £35 more for the 150gdp model.

TDS meter - https://www.osmotics.co.uk/products/HM-Digital-TRM%252d1%3A-Triple-Inline-TDS-Monitor.html
I figure the triple reading will let me see what going in and that a zero reading is be8ng produced and the third reading will let me know which filter needs changing  when I no longer get a zero reading.

Storage - https://www.tanks-direct.co.uk/water-tanks/water-storage-tanks/10-50-litre-water-tanks/25-litre-water-tank-with-handles.html
I plan to get two of these, one for RODI and the other for salt. They come with or without the outlet which is brass and I believe this is no good for the salt water.

Auto shut off - https://www.osmotics.co.uk/products/Auto-Shutoff-Kit-with-Float-Valve.html

Can anybody help with he following questions please? 

- Do I just get both storage tanks without the outlet and drill myself?

- What parts do I need and where do I get them from to connect the starge tanks so I can pump RODI to the salt tank and also be able to fill a container from either the RODI tank or the salt tank?

- What parts do I need to insert the tube from the RODI system into the RODI storage tank?   I’m trying to keep this sealed so taking the tank lid off and just putting the tube in won’t do.

- I want to put a heater and pump into the salt tank but how do I do this whilst keeping the system sealed and which pump would be suitable?

- Should I just have one storage tank for the RODI and then drain this into a mixing bucket on water change day and use a pump and heater in the mixing bucket?  If so, which pump and heater and where do I get a mixing bucket from? 

- If I just get a storage tank for RODI, should I get a larger one, say, 100 litres, so I have enough for a complete water change should something go wrong? 

Thanks for any advice you can give. 

CH  8D




Last Edit: Feb 3, 2018 6:53:40 pm by ClawHammer

Gav

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Reply #1

Hi CH , As you've already found , the container with the brass outlet is no use , the only issue i foresee with drilling yourself is that you'd need to get your arm inside the container to attach the bulk head fitting to the container , I use a camping style water Gerry can which comes with a plastic tap also 25 litre .

Easiest way to transfer is to simply keep the RO container on a shelf above the salt mix container , no pumps required , cut a notch from the front of the shelf to allow access to / from the tap of the RO .

Not too sure how trying to fill a sealed container will go as the air will need to get out .

There's no real need to seal up the salt container as you'll probably be using it not long after mixing , and again the size of the lid may restrict what could be placed in container . As you've already said - Should I just have one storage tank for the RODI and then drain this into a mixing bucket on water change day and use a pump and heater in the mixing bucket. - Yes -

A small pump or powerhead should be fine to mix 25 l at a time and probably 100w heater , I use a 30 litre mango bucket , which is of food grade plastics .

Having large enough storage if you've the space is always a good idea .

jordanweasel

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Reply #2

Ok so i will tell you how i do mine and mabe you can take from it and add to your own way of making your water.
This is the easiest way i can find how to make mine without it being a chore 👍
My RODI unit is a cheep £40 ebay one and gives me 0tds readings for about 8months. Once the tds gets to around 5 or 6 i just simply buy another one and bin the old one.
When i get the RODI i make sure it comes with the garden hose connector on it so i just clips on the garden tap like the hose does
I then get my water container and just pop in the RO hose from the  RODI unit and turn it on.
After about 4 hours am done.
(My RODI unit needs 100ltr of water to make 25ltr of RO water so i have 75ltrs of waste water. i just use it to water the garden so i got a 250ltr garden waterbutt and just directed the waste line from the RODI unit to this)
My 25ltr containers have the big screw tops  so i just drop in a heater and a nano wavemaker into them and leave it overnight,
Then in goes the salt and and after a few hours am good to go 👍
Hope this helps

ajm83

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Reply #3

Ok so i will tell you how i do mine and mabe you can take from it and add to your own way of making your water.
This is the easiest way i can find how to make mine without it being a chore 👍
My RODI unit is a cheep £40 ebay one and gives me 0tds readings for about 8months. Once the tds gets to around 5 or 6 i just simply buy another one and bin the old one.
When i get the RODI i make sure it comes with the garden hose connector on it so i just clips on the garden tap like the hose does
I then get my water container and just pop in the RO hose from the  RODI unit and turn it on.
After about 4 hours am done.
(My RODI unit needs 100ltr of water to make 25ltr of RO water so i have 75ltrs of waste water. i just use it to water the garden so i got a 250ltr garden waterbutt and just directed the waste line from the RODI unit to this)
My 25ltr containers have the big screw tops  so i just drop in a heater and a nano wavemaker into them and leave it overnight,
Then in goes the salt and and after a few hours am good to go 👍
Hope this helps


Tell me you aren't throwing the whole lot away every time...?

jordanweasel

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Reply #4

The RODI unit?

ajm83

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Reply #5

The RODI unit?

Yeah, the whole lot, or just the DI stage?  (Even that can be refilled, save you at least a tenner a time)

jordanweasel

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Reply #6

I pay about £40 for the whole unit and i costed it once to change all filters and DI and i came to around £35 so i thaught it was just worth paying that extra £5 to get a new one and just use the old one for spare parts  lol

ajm83

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Reply #7

I pay about £40 for the whole unit and i costed it once to change all filters and DI and i came to around £35 so i thaught it was just worth paying that extra £5 to get a new one and just use the old one for spare parts  lol

Fair enough,  guess you have to put a price on your time as well.

That said I'm sure you could save some cash if you wanted to.

My RO unit looks similar,  and a carbon and sediment filter set is £8.99 for both. I change them every six months or so.  Allegedly you can leave them for a year and still be okay.

The RO membrane I haven't changed in 3 years, still 99% rejection rate so no need to replace it.  Just flush it for 20 mins every now and then with the bypass switch.

New DI resin (virgin TULSION MB-115) is £6.50 a litre which I think will easily fill that DI chamber. Just make sure you pack it in nice and tightly. I change it when I get a TDS of 1. Lasts me a few months.

Yearly cost is £20-30 and the TDS never goes over 1 - and my tap water is total crap (one of the many joys of Essex lol )  If you let the TDS go to 5 I reckon it'd last a lot longer.
Last Edit: Feb 5, 2018 11:16:01 am by ajm83

HK_Fuey

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Reply #8

You can get much bigger containers if you're thinking longer term, for a bigger tank.
https://buybuckets.co.uk/product-category/open-top-kegs/

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