The more salt you add the better the skimmer will work so what ever amount your fish can handle is what you should use I use 1 tablespoon per 5 gallons of api freshwater salt I found it work better then normal salt because you can add more of it. It also helps keep fish healthy.1) Duanes, do you add salt to your water? Is your water hard?
2) Catfishguy, have you tried less salt but found that this was the correct amount, or did you start with that and kept it because it worked?
I'm impressed by what both have posted and starting to think that this is a good idea. I just want to know if there are factors I'm missing.