How to get rid of red algae

[Seamazter]

reduce its food source
increase your flow
siphon all you can see out of your tank daily till its gone.

Normaly redslime grows in areas where dead foods rest, stop overfeeding and making sure no food makes it to the bottom of your tank.
increase your tanks flow to keep deadspots from acumilating, uneaten food and waste collects in these spots and gives fuel to the redslime.
Siphon as much as you can out, when this bactiera starts to die it poisons the water and can affect your fish, removing as much as you can stops it from growing and helps stop it from polluting your tanks.

I and many other canreefers have used coralsnow and it removes or slows the growth of redslime.

If you buy the redslime remover from the store shame on you, sure it works, but in the end it kills much more in your tank then the redslime, from good bactieria to smaller pods and even posibly your fish or corals, a side affect of these is they lower the oxegen content of the tank to aid in the killing of the bactieria and inturn damage your bio filter that also requires oxegen.