LOL! You're not going to need that, but you can use that if you want. Still... it is very funny that you're having cloudiness issues as you receive this.
I dislike that people quickly get into the mindset of both blame and need. Doing so will put you on the road towards great stress and probable failure.
There's very little that you 'need' for a reef tank. Be honest with yourself. Instead of needing everything, and/or jumping to conclusions quickly, address things as "this product will help me with XXX. Do I want it?" If you're telling yourself that you need everything, you leave zero room for yourself to say 'No'. This results in dumping all sorts of chemicals and products into your tank, draining your wallet, and fluctuating your water chemistry resulting in the death of livestock. If you're able to say 'No' 95% of the time... then your wallet will be protected, your chemistry will have a chance at becoming stable, and you'll be likely to have greater success and enjoy the hobby for a long time. =]