When I use the Original Floralife or Professional, a milky 'residue' results regardless of how long the solution is mixed. Is this a problem?

No. Original Floralife and Professional are aluminum sulfate based flower foods. One characteristic of this type of chemistry is a milky residue called a flocculent.

This flocculent is beneficial to cut flowers. If a clear solution is desired, try Floralife Crystal Clear. More.

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