Any of the detergents that we carry can be used in both front loading and/or HE machines as well as top loaders. However if you have an HE machine, check the recommended detergent amount on the back of the package. HE machines require much less detergent than traditional top loaders.
If there are too many suds, reduce your amount of detergent, if the diapers are not getting clean enough, increase your detergent slightly until you find your sweet spot that works for your water conditions and specific machine.
And, as always, ask us if you have questions!