APTFix sounds like gluteraldehyde from the description that it is effective against BBA, biodegradable within 24 hours, and will not harm plants except Vals, mosses and liverworts. There is less description on Buce algae control and the MSDS is uninformative, but it appears to be another repackaged Glut. Both claimed to be non toxic to fish and shrimp, which is true as Glut is least toxic to live stock. Personally I have dosed Glut at twice the recommended dosage with no impact on fish and shrimp. Glut, however, is narrow spectrum and is ineffective against GSA, GDA, green water, and green thread algae (spirogyra, clado).
Interestingly, both 2Hr and Buce web sites have an algae control section and both recommend using Glut and H2O2 to treat algae while marketing their own repackaged Glut products.