+dapettit Posted October 10, 2007 Share Posted October 10, 2007 I know this topic came up earlier I just can't find the post. . . I am creating my on RO/DI water. It is being stored in a 55 gallon drum until I need to mix up some salt or top off. Does the water need to be kept circulating (to keep from going stagnate)? Everything is telling me yes but I’m not sure about RO/DI water. Just want to confirm my thinking. TIA, Dave- Quote Link to comment Share on other sites More sharing options...
Entropy Posted October 10, 2007 Share Posted October 10, 2007 In theory no. The only thing you have to worry about is the container leeching contaminants into the water since RO/DI is corrosive. Quote Link to comment Share on other sites More sharing options...
Headless_donkey Posted October 10, 2007 Share Posted October 10, 2007 I would keep salt water moving f you plan to keep it for a long time. RO/DI should be fine stagnant. Quote Link to comment Share on other sites More sharing options...
cmanning Posted October 10, 2007 Share Posted October 10, 2007 We usually keep an air stone. When we add the salt, we keep it mixing till the water change is done. Quote Link to comment Share on other sites More sharing options...
+dapettit Posted October 10, 2007 Author Share Posted October 10, 2007 Thanks, I knew I needed to keep the salt moving. However I did not know RO/DI water was corrosive, interesting. . . Quote Link to comment Share on other sites More sharing options...
Entropy Posted October 10, 2007 Share Posted October 10, 2007 It is not like acid or anything. I am by no means a chemistry major, but basically (for us simple folk) when you DI water you end up making it extremely friendly and it will bond with just about anything, which is basically the reverse of the process (DI) that got it to pure in the first place. That's why a lot of semiconductor companies use it to wash parts and to run through their systems because it will keep the systems cleaner. Quote Link to comment Share on other sites More sharing options...
apedroza Posted October 11, 2007 Share Posted October 11, 2007 Actually straight water is a little corrosive. But the addition of the DI boosts it a little more. Quote Link to comment Share on other sites More sharing options...
+Mitch Posted September 17, 2012 Share Posted September 17, 2012 (edited) Resurrecting this old thread... i finally setup my salt mixing station w/ 55g barrels, and prefer not running the pump for the salt water storage 24/7. is it ok to run it 4x a day for say 15min each? I'm using a Mag5. Edited September 17, 2012 by Mitch Quote Link to comment Share on other sites More sharing options...
victoly Posted September 17, 2012 Share Posted September 17, 2012 What you are combating against by agitating the water is elements coming back out of aqueous solution. Mixing will counteract that by churning the natural gradient of heavier saline water on the bottom of the barrel and less saline water at the top of the barrel. I don't have personal experience with storing large quantities of saltwater, but I would think that you would be OK doing minimal mixing. That pump is in pretty caustic conditions already, so turning it on/off that many times per day may not be optimal for pump longevity. I might suggest fewer on periods, but for a longer interval (2x for 30 minutes or maybe even once a day for an hour). What is the turnover like in the barrel in terms of how much SW you are using per week? Quote Link to comment Share on other sites More sharing options...
+brian.srock Posted September 17, 2012 Share Posted September 17, 2012 I'm in the process of making a better water station since with my old one I would get some kind of film on my new saltwater that didn't look good and if left in my can for too long would deposit a white film possibly from CA on everything. Quote Link to comment Share on other sites More sharing options...
+Mitch Posted September 17, 2012 Share Posted September 17, 2012 @brian, i get a chalky white residue (vs "film"), and i was previously running continuously an MJ1200. @victoly, i've been pretty lax about water changes, so maybe 20 to 25g once per month. i understand your statement about things coming out of solution if it's not continously agitated, and am willing to "loose" some in trade for less power consumption. i will assume what will come out of solution is more of this chalky residue noted. as far as the salt water being caustic to the pump, the pump itself is not submerged so i would think only the impeller and internal "chamber" would be at risk, with the impeller considered a wearable item anyways. Quote Link to comment Share on other sites More sharing options...
victoly Posted September 17, 2012 Share Posted September 17, 2012 @brian, i get a chalky white residue (vs "film"), and i was previously running continuously an MJ1200. @victoly, i've been pretty lax about water changes, so maybe 20 to 25g once per month. i understand your statement about things coming out of solution if it's not continously agitated, and am willing to "loose" some in trade for less power consumption. i will assume what will come out of solution is more of this chalky residue noted. as far as the salt water being caustic to the pump, the pump itself is not submerged so i would think only the impeller and internal "chamber" would be at risk, with the impeller considered a wearable item anyways. i don't think that it has to be continuously agitated, some of the reactions happen fairly slowly. It might be the kind of thing where semiannually you use up all of your mixed water and give the barrel a vinegar or HCL bath to remove residue. Quote Link to comment Share on other sites More sharing options...
+KimP Posted September 17, 2012 Share Posted September 17, 2012 Just want to throw this out there. If I continually mix my water, the pump warms it up too much to use. So I get it mixed for 24hrs or so and turn of the pump to let it cool to room temp. It's not much warmer, but I like it to be the same temp. Quote Link to comment Share on other sites More sharing options...
Timfish Posted September 17, 2012 Share Posted September 17, 2012 Is ther a problem using an air pump? It might be noisier depending on the air pump but it won't add heat to the water and is cheaper to run. Quote Link to comment Share on other sites More sharing options...
+KimP Posted September 17, 2012 Share Posted September 17, 2012 No problem that I see, but it would take a whole lot longer to mix the water than the huge pump I have thrown in there Quote Link to comment Share on other sites More sharing options...
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