According to the sticky 'Marine Common Questions' it will.
Quote:"Sand
Question - What type of sand do we have to use?
Answer There is no type of sand that you have to use, however, there are some types of sand, which are recommended. The most common type of substrate used in todays marine aquaria is Aragonite Reef Sand. This type of sand is very fine and is roughly equivalent to sugar grain size. The type of sand offers a very good buffering agent for keeping the pH in balance. As an average weight, you will need roughly 1lb of sand per gallon of water.
Question - Can use silica sand for my bottom?
Answer Silica sand is not a good choice for marine substrate; it will do nothing to buffer pH, is very two-dimensional to support microbial life, and will compact very easily and create anaerobic zones.
Question - What is the big deal with the amount of sand used?
Answer The amount of sand used in the tank is mainly dependant on personal preference. A deep sand bed will allow anaerobic bacteria to convert the nitrates in the tank water into a harmless by product, Nitrogen and the nitrogen gas will then get released by our sand stirring fish and inverts.
Question - Is it possible to use good old beach sand from the Ocean?
Answer Beach sand is probably one of the worst types of sand to collect and use as a substrate in your aquarium. It is mainly going to be high in silica content, which will lead to algae blooms in the tank. The other issue to consider is pollutants. How many times have you been at the beach and seen the waste and gunk on the beach? This question sort of answers itself. Would you want that to be going into your aquarium? You basically have no idea what has been passed through the sand that youre collecting which turns it into an unknown quantity. You ALWAYS need to know and understand what is going into your system." Unquote.