I never use a full dose of those two products Mela pima fixes. I use a 25% dose of full strength each when combined and only a 50% dose max when used alone. They work good but you can OD the fish too easy at full dosages.
Really!? Well, varying experiences? I do know this. You have to shake the bottles of each really well so the active ingredients distribute evenly. I'll leave it at that.
When in doubt, do a water change.
"This ain't rocket science!"
Never miss a good chance to shut up. - Will Rogers