This is only anecdotal, but I use aloe in almost every watering. My theory is use it more often, but in smaller quantities. I might only add 1/2 tsp of the 200x powder to 5 gallons in some cases, others up to 1/4 tsp per gallon. And imo there are many reasons to use aloe:
The ten main areas of chemical constituents of Aloe vera include: Amino Acids, Anthraquinones, Enzymes, Minerals, Vitamins, Lignins, Monosaccharide, Polysaccharides, Salicylic Acid, Saponins, And Sterols.
Amino acids found in Aloe vera include: Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Valine,And Tryptophan. Some Of The Other Non-Essential Amino Acids Found In Aloe Vera Include Alanine, Arginine, Asparagine, Cysteine, Glutamic Acid, Glycine, Histidine, Proline, Serine, Tyrosine, Glutamine, And Aspartic Acid.
Enzymes include Amylase, Bradykinase, Catalase, Cellulas, Lipase, Oxidase, Alkaline Phosphatase, Proteolytias, Creatine Phosphokinase and Carboxypeptidase.
Aloe vera also contains Vitamins B1, B2, B3, B5, B6, and B12 along with Choline, Calcium, Magnesium, Zinc, Manganese, Chromium, Selenium. Additional elements found in Aloe vera include Copper, Iron, Potassium, Phosphorus, And Sodium.
And I agree with Stow, I often use it in foliars - more times then naught. It is also always included in my cloning solutions. Do keep in mind unprocessed aloe will ferment quickly, so it is best to use within 20 minutes of blending the leaf.
P-