<a href=showthread.php?s=&postid=13487242#post13487242 target=_blank>Originally posted</a> by Playa-1
The procedure I would recommend for you is:
-Fill a container with RO/DI water (not spring water).
-Add a powerhead and a heater to the container.
-Measure the salt out and add to the container of water.
-Allow the mix to circulate for at least 4 hours (leaving to circulate over night would be better).
-Measure the salinity with a calibrated refractometer and make adjustments as necessary by adding additional salt mix or water to get the salinity reading where you need it. Allow to circulate for a while, retest, and repeat procedure as necessary.
I would suggest that you have the water ready to go at least a day in advance and It's always a gr8 idea to have additional water ready to go in case of an emergency. It's wise to use a much larger container for salt mixing and RO/DI storage.
To give you an idea. I have a 30 gallon brute container with mixed salt water that I keep mixed up ready to go. I also keep a 30 gallon container of RO/DI water on a float valve. A 5 gallon could be used but it's going to be a real pain.
Temp needs to be close and the salinity needs to be exact unless your making some type of an adjustment.
Before you do a water change grab a turkey baster and use it to blow off the liverock in the tank. Make sure the baster is clean and free of any soap residue, It may be a good idea to have a dedicated turkey baster for this process. You can use the turkey baster to lightly blow off some of the sandbed, roughly 25% of the sandbed. Care should be used so that you only disturb the very top of the sandbed. This process will get lots of detritus back into the water column and then when you do a water change, a percentage of this waste will be physically exported with the water. Any mechanical filtration will also help with the detritus removal from the water column. After the water clears up, It would be a good time to clean up any mechanical filters that you may have in the tank.