Heat water during mixing?

So I was reading up on Red Seas Coral Pro salt mix and I read that you should use un heated RODI water and mix until clear. It is unclear as to weather or not I should heat the water to 78 degrees before adding it to my tank. I always heat my water when doing a water change. Am I doing something wrong here? I'm currently using reef crystals, but want to change to red Sea.

Any thoughts??
 
A pump mixing for 4 hours will warm it slightly but at 10% change the temperature change is not an issue. RSCP will mix best at room temp and unless you are doing a massive change, you do not need to bring the temp up. If you are going to raise the temperature, mix it first at cool/room temp for the mixing time (4 hours max) then raise it slightly before adding to your tank. More info here:
http://reefcentral.com/forums/showthread.php?t=2052771
 
I don't heat the RODI water for the initial mixing process; though I do subsequently heat it up to tank temperature before adding to make certain the salinity is a match.
 
The Red Sa Coral pro is loaded up with extra ak and calcium. Cooler water lets more alkainity and calcium dissolve than warmer water.Lots of folks have trouble with it.
 
I'm using Omega Sea Reef Salt, and I've been heating the water up to 78-80 prior to mixing. Thought this was the way it was done since things dissolve better on warmer water. I use a 700gph mag drive to mix.
 
I'm using Omega Sea Reef Salt, and I've been heating the water up to 78-80 prior to mixing. Thought this was the way it was done since things dissolve better on warmer water. I use a 700gph mag drive to mix.

While the warmer water will in fact help the salt dissolve faster, it also facilitates the alkalinity combining with the calcium easier to form calcium carbonate. Mixing the salt in cool water may cause the salt to take a little longer to dissolve, but it also will lessen the amount of calcium precipitation.
 
Heating the water to match the aquraium water isn't even necessary if small water changes ,say 2% or less at a time are done. Personally, I do 1% per day and keep mixed aerated salt water on hand at room temperature.
 
On the RSCP you will definitely get precipitation if you heat while/prior to mixing. I leave it at mid 60's to dissolve the salt, then warm to DT temperature. Takes less than 90 minutes to dissolve 40 gallons worth. When I've heated or mixed too long I get lots of "flakes" floating on the top.
 
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