New tank

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Hi iv just purchased a vision 260 tank with the intention of keeping marine fish (never kept fish before), been told I'd save money with an RO/DI unit and advice on what brand to look for, how much I should be paying and how convenient they are? Thanks
 

Mike

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Reply #1

Hi, Tommy.

Welcome to the forum.  :glad:


RO/DI units obviously cost money, and they reject a lot of water too, so you're on a water meter, it'll cost you for sure, but it's far far better than using plain tap water, and going to LFSs for water will cost too, so you will end up better off overall, although it's unlikely to be a huge monetary saving...

As for company, Vyair and RO-MAN are the two big favourites in Reefing communities. I've had a unit from both.

http://www.vyair.com/

http://www.ro-man.com/

You can get a decent two stage 50GPD (gallon per day) unit for around £60 probably, but it can be a false economy getting a small, few stage low capacity unit as the membrane and pre-filter clog quicker as there's fewer pre-stages and you won't get as pure water.

You may or may not need a pressure booster pump. It depends on your tap water pressure.

As for convenience, if set-up well, they're very convenient. My unit is pretty elaborate but works flawlessly. I have a little extra tap on the kitchen sink with purified water, and a long 20ft line i can draw out from under the kitchen cabinets with a tap on the end to fill my ATU (auto top up unit) reservoir. It has a 15L balloon tank which collects and gives you an instant 15L rather than having to wait (as RO units are quite slow at producing water, it's a trickle without a balloon tank).

Hope that helps. Ask as many questions as you want.  :cool:
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Tommy10385

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Reply #2

Hi I-conica

I was looking at getting a cheaper version but what you said makes sense I would rather pay more for a decent unit.

I'm limited for places to put the system so it would have to be a portable unit if possible? Pretty much every forum I come across claims il save quite a lot in the long run with an RO/DI unit would you agree with this? Taking into account I'd only really be changing 15% of my 260l tank every 2weeks ( I think that's right?) will I see a significant increase in my water bills?

Thanks

Tom

Mike

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Reply #3

As the alternative is buying your RO water from a shop, it's not only going to be cheaper long term (fuel is factored in too), but much more convenient and less effort. Saving effort is important as if doing partial water changes is a lot of effort, it'll be easy to put them off, neglect them, etc. Also you can't be sure of the quality of the water from LFSs as they're not known for changing their filters/membranes that often!

You can use a small unit and move it around yes, but the membrane must stay under pressure, so you'll have to have taps on all connections (the pure line, raw line and waste line) so you can shut these off if you disconnect the unit, this will keep it's internal pressure up, otherwise the membrane can be damaged.

I think 15% per week is more realistic, but it depends on stocking level. If you think about it, a 15% water change only reduces nitrates and phosphates by 15%! Over two weeks those nutrients will have risen by more than 15%.. So you'll never keep them down if you're not changing enough.

You could do with thinking about other forms of nutrient export too, like Chaetomorpha (chaeto) algae if you have a sump, or a reactor with Rowaphos in it to remove Phosphate, which can be fitted to a sumped or sumpless tank.

It'll put your bills up a bit, but it's only going to be the equivalent of an extra person living with you, showering, flushing the toilet, etc. My bill is a bit higher, but I draw a hell of a lot of water from mine!  :grin:

Mike.
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Tommy10385

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Reply #4

Thanks for the advice I am going to go ahead with getting an RO/DI unit, is there one you would recommend? I'd like a decent portable unit that isn't going to be difficult to get spares? I appreciate I'm asking a bit much here so il understand if you leave that one to me.

I will go for the 15% a week as you suggested.

With regards to bills is there a noticeable rise in electricity bills? I plan on having my vision 260 as a reef tank eventually so iv purchased a protein skimmer and uv filter so far swell as the tank with its T5 lights, heater and filter, I know I will need some extras but as I'm completely new to this hobby (although always wanted to get involved in it) iv not got round to getting them yet.

Thank you

Tom

Mike

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Reply #5

The main electricity drain in a tank is the heater. For your tank, a 200~300W heater will be enough, and that'll pull as much as a big plasma screen, but it's not on 100% of the time, and is hardly ever on in summer.

Then there's the lighting, but assuming you're going to get LEDs, and controllable ones at that, they'll draw far less than metal halides or T5s for the light output, as they're more efficient and produce less heat. T5s are fine, but you'll want to upgrade to LEDs in the future anyway. :)

You can work out the power / money it'll cost by adding up the total watts, duty cycle of lights, heater, etc, to total KWh of power, then you'll be able to see how much your supplier charges per KWh and you'll know how much it'll cost. I've not worked out mine, but that's because I don't really want to know! It creeps up as you add more equipment down the line, but you won't mind as you'll be addicted and love your tank by then...

All RO units are pretty much a bunch of spares, every part is a spare part, every bit can be replaced, it's all standard stuff no matter where you get it.

This is a good midrange setup but you might want a 15L balloon tank to go with it, and also you'll have to get those taps if you intend on disconnecting it and putting it away after use.

http://www.vyair.com/scripts/prodView.asp?idproduct=137

Give Phil at Vyair a call, he's very helpful and knows RO units inside out so he'll get you everything you need and aftercare is second to none, too.
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HK_Fuey

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Reply #6

+1 to all that advice.  Vyair were brilliant with me.  Been back to them a few times because of the great service.
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Tommy10385

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Reply #7

Thanks for the advice, iv contacted Phil and hes sending me out a pressure tester for my tap water and then hes going to advise on what I might need :).

When it comes to mixing my water with salt is there any salt brands I should look for? Iv looked on ebay and they seem to be the same price as in store and i'm not sure how much I should be paying?

Thanks

Mike

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Reply #8

Told you Phil is a good guy. :)

Your salt thread is here. https://reefbase.co.uk/general-reef-discussions/salt/
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T-Bone Tyrone

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Reply #9

I have a Vyair unit, a pumped 50GPD RODI.
I have mine set up outside.
I should really sort this out!!

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