Christyef Posted January 20, 2019 Share Posted January 20, 2019 When we dose, we have to dose cal/alk at alternate times bc they will precipitate. Why doesn’t this (or does it) happen when we mix our salt for a water change? Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
victoly Posted January 20, 2019 Share Posted January 20, 2019 Because they are already in relatively stable concentrations in salt. When we dose, the area that is dosed is saturated with more than the water can dissolve normally in a short time. When both get dosed at causes them to more or less combine and form into a solid which cannot dissolve readily. Quote Link to comment Share on other sites More sharing options...
jolt Posted January 20, 2019 Share Posted January 20, 2019 My understanding is that the precipitation happens because of the ph difference between the highly concentrated dosing solution and your aquarium water. The dosing solution is much higher ph than your aquarium water. Mixing salt probably does not have this happen because things are at pretty much the normal concentrations and PH is probably neutral in rodi water. http://reefkeeping.com/issues/2005-07/rhf/index.php#4 Quote Link to comment Share on other sites More sharing options...
victoly Posted January 20, 2019 Share Posted January 20, 2019 RHF always comes through to show you how complicated you thought a simple thing was. Quote Link to comment Share on other sites More sharing options...
Christyef Posted January 20, 2019 Author Share Posted January 20, 2019 RHF always comes through to show you how complicated you thought a simple thing was.I googled RHF to avoid asking a dumb question and got retirement housing fund and rhf bourbon.... doubt that either of these is what you meant, so what is RHF? Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
victoly Posted January 20, 2019 Share Posted January 20, 2019 Randy Holmes-Farley. Sent from my iPhone using Tapatalk Pro 2 Quote Link to comment Share on other sites More sharing options...
Christyef Posted January 20, 2019 Author Share Posted January 20, 2019 Ok, one more question. I’ve seen mixed opinions on how long, or if it even matters, leaving the salt mixing before adding it to the tank in a water change. If it loses potency the longer it mixes, wouldn’t that mean it depletes faster in the tank bc of the coral absorption PLUS being just “mixed around”. If nothing is removing the elements from the water, then the ca/alk/mag, etc shouldn’t change no matter how long it’s sitting there swirling around in out mixing station tubs. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Christyef Posted January 20, 2019 Author Share Posted January 20, 2019 Randy Holmes-Farley. Sent from my iPhone using Tapatalk ProAh! The link Jolt shared. Ive never seen those. Thank you for the insight. Never heard of him. I bet I could find the answer to my last (and all) my questions in his writing. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
+Dogfish Posted January 21, 2019 Share Posted January 21, 2019 15 hours ago, Christyef said: Ok, one more question. I’ve seen mixed opinions on how long, or if it even matters, leaving the salt mixing before adding it to the tank in a water change. If it loses potency the longer it mixes, wouldn’t that mean it depletes faster in the tank bc of the coral absorption PLUS being just “mixed around”. If nothing is removing the elements from the water, then the ca/alk/mag, etc shouldn’t change no matter how long it’s sitting there swirling around in out mixing station tubs. Sent from my iPhone using Tapatalk Its my understanding that Co2 in the air will mix with the water. This will alter the Ph and Alk of your mixed salt water. Quote Link to comment Share on other sites More sharing options...
victoly Posted January 21, 2019 Share Posted January 21, 2019 19 hours ago, Christyef said: Ok, one more question. I’ve seen mixed opinions on how long, or if it even matters, leaving the salt mixing before adding it to the tank in a water change. If it loses potency the longer it mixes, wouldn’t that mean it depletes faster in the tank bc of the coral absorption PLUS being just “mixed around”. If nothing is removing the elements from the water, then the ca/alk/mag, etc shouldn’t change no matter how long it’s sitting there swirling around in out mixing station tubs. Sent from my iPhone using Tapatalk For some of the mixes, red sea coral pro comes to mind, they really oversaturate some of the parameters (e.g., alk) so that people have to dose less maybe? In that case, if there is more alk than can sustainable stay dissolved at whatever conditions they are mixed at (temperature/pH mostly), some of the alk or caco3 or whatever is supersaturated will precipitate out as scale. If that's what you mean by potency I can see that, but I would be careful basing decisions on things that cant be measured or defined. Quote Link to comment Share on other sites More sharing options...
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