I do agree but you must also find the source or your alge will come back. In most cases it is high nutrents and in your case you say you have red slime (cayno) then you deffently have high nutrents in your tank. are you running a skimmer how much flow do you have. Cut back on feedings and make sure you dont have dead spots in your tank. Also what are you feeding.I am sure we can get the algae issue solved. My stock answer for most algae problems is to deny the tank light. I just turn the lights off and cover the tank with a sheet for about 4 or 5 days and only feed the fish when the room is darkened. It does not hurt them and will kill the green algae off. This works with any algae I have ever had. Also cut back on the amount you are feeding your fish.
I hope this helps or someone else gives you an answer that will. Thank you for joining us and I want to welcome you to the site.
Is this a SW setup or Fresh?
What do you have in the tank?
What are you feeding?
How long has this been a problem?