Mixing and Filling the Reef Tank

The day had come.  Everything was done and I was finally ready to fill up the tank.  Mixing salt water is the very core of keeping a reef tank but in itself is not an exciting topic so I won't dedicate too long of a post to it.  First, you need to make sure that whatever container you choose to mix your salt water in is composed of food grade plastic.  This means that it will not leach chemicals into the water and will not break down with the salt.  I use a Rubbermaid Brute trash can to store and mix my salt water.  This is the top pick amongst reef enthusiasts.

It is important that you never mix salt water in a tank with live organisms, the undissolved salt is too caustic and can harm fish and invertebrates.   It is important to use a good quality salt mix.  Every reef enthusiast has their favorite brand of salt.  I use Reef Crystals.   I know some people will ask, can I just use table salt?  The answer is no.  Aquarium salt contains other trace minerals and PH buffers.




Now that you have selected your preferred salt mixture and your mixing container all you need is a power head and a heater.  You will want to make sure to mix the salt water for at least 24 hours before adding it to your tank.  You will want to match the temperature of your tank as well as the specific gravity.  With so much money already invested it's easy to just get a cheap hydrometer.  In my experience this is not a good idea.  Spend the money and get a good Saline Refractometer.  It will benefit you and your tank in the long run.