i am not a big fan of adding anything to a tank for normal tank problems especially algea.algea is normal in new tanks and caused by lack of maintanence on mature ones.a quick fix isnt the way to go.red algea is probably the hardest to get rid of.personally i suck it up with water changes but it will still usually take a few months to get rid of it naturally.
add a phosphate reactor,use less light,increase flow all things that will help rid you of the slime.over the years i have read about things to put in the tank and as far as i am concerned they are either snake oil of will harn other things in the tank.you are trying to kill off a living thing dont you think the stuff to kill it will harm other living things in the tank?