Mixing Saltwater and getting it back into your tank....

[Aquattro]

I siphon my tank to the bathtub with a 50ft hose, with the tank end measured to drain 50g exactly. I then take the tub end of the hose to the 50g mixing barrel, hook it to a MAG12 and plug it in. When it sucks air, I'm done. Takes about 20 minutes.