IMO it is best to use something like the boyd product, increase h20 flow (no dead spots) decrease organics (skimming, less feeding, chemicals in h20 source- phosphate levels--sometimes decreasinbg the light).
My point here is that many of the products that are marketed --specific "red slime remover", are antibiotics--usually some thing like or is erythromycin. Problem here is the red slime is a bacteria--good the remover will kill it at least for a while, enough where you can not see any. BUT the bigger problem is that you are also killing the "good" bacteria that are helping you tank to process wastes. You may have a nice dSB---but totally destroy it with these chemicals.
Try some other routes or a combination of the above--before you dose your tank with drugs.
The above things worked great for me! HTH Good luck!