DI water ?

As long as you keep it sealed up it should last forever. You will get a little bit of TDS showing up as gasses like CO2 from the air dissolve into it, but that is absolutely no worry. As long as it was pure when you stored it and you haven't let anything get into it then it will be fine indefinitely.
 
i always have gallons and gallons of mixed saltwater left over after water changes. it isn't unusual for mine to sit for a couple of weeks, even with the salt mixed in. never have any problems.
 
Also a good idea to keep it sealed in an opaque container (or keep it in a dark area) as extra insurance against algae growth IMHO.
 
Thanks guys

I'm thinking of setting up a mixing station with 20 gallon brute trash cans on wheels. They come in a lot of different colors and have lids. What would work best for mixing? A pump or power head? Any brands you guys like?
 
Thanks guys

I'm thinking of setting up a mixing station with 20 gallon brute trash cans on wheels. They come in a lot of different colors and have lids. What would work best for mixing? A pump or power head? Any brands you guys like?

I use a 1000gph circulation pump in my mixing station...

Just a 33gal (I think) grey brute can.. I had an extra that I wasnt using.. seems to work fine for me. Look like a little whirlpool if left untouched for a min..
 
i always have gallons and gallons of mixed saltwater left over after water changes. it isn't unusual for mine to sit for a couple of weeks, even with the salt mixed in. never have any problems.

Along these lines... I keep around 15-20 gallons of saltwater onhand all the time in a holding tub. I use it for water changes, then replenish. About once every 6 months (if I'm diligent) I use it all up and clean out the holding tub. So until then, in theory, some of that water has been in there for 6 months, just getting diluted every week with 5 gallons of new water. I've never had issues doing this.
 
I have 35 gallons clear well with a heater and a powerhead in the clear well with a float valve and the rodi plumbed straight into it, my ATO feeds straight from the clear well into my sump/refugium.
Water changes I pump directly from the DT down the drain and my ATO fills the tank back up again, sometimes I over fill my sump with all 35 gallons then just pump the overfill out into the drain, a 35 gallon water change takes about 15 mins. (I premix my salt solution for about a hour prior and run a airline to put some oxygen through it prior to pumping into the sump/refugium)

My regular top up is 5-8 gallons per day, depending on the weather.
 
Do you guys keep the DI mixing when it's just sitting? I know slime can build up if water just sits for a while.
 
I use about 40-60 g of salt water a week.
My RO/DI is in a covered 55 gal drum, no agitation.
I mix SW in a covered Brute with a MaxJet 900.
About once every 2 months, I rinse the salt barrel with a garden hose, wipe down with an RO/DI dipped rag and sun dry.
 
Thanks guys

I'm thinking of setting up a mixing station with 20 gallon brute trash cans on wheels. They come in a lot of different colors and have lids. What would work best for mixing? A pump or power head? Any brands you guys like?

My setup might give you some ideas.

I run RODI straight into my "mix tank" (I have shutoff with float valve in the side of the Brute up near the top). I then heat the RODI water and add salt. A Mag9 with hard plumbing mixes the salt in. When ready for WC I turn some valves and send water via hard plumbing (PVC) to the sump.

FYI I have stored mixed SW (IO brand) for 2mo with no problems. Always nice to have 25g of SW ready to use if emergency WC is needed.

You could do the same with a Brute on wheels and a hose attached to the Mix tank pump. I use a Mag9 as it is a backup pump for my Return pump. (if return pump on tank fails I just grab the mix tank pump and return is back in business.







 
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