This is the one i use.
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there is some debate on which is better for plants , hydrolyzed or emulsified?
Hydrolyzed Fish Fertilizer
This product is an excellent source of N-P-K (nitrogen, phosphorous, potassium) and contains trace minerals. Hydrolyzed means that it has been cold processed, which is very important.
Fish emulsion is heat processed, meaning that a lot of the nutrients and amino acids are totally destroyed during processing, leaving you with a product that has little nutritional value and a smell that is memorable.
Hyrdrolyzed, on the other hand, keeps all its nutrients and proteins and allows them to be readily available to the plant. It also makes those nutrients water soluble, so you can use them for foliar spraying or drip irrigation, with no worries of clogging. Because it does contain many minerals, it helps to keep the soil balanced and, in fact, improves soil quality just like an amendment. The N-P-K are 4-2-2, still fairly low, but used a little more frequently, I have seen this product do just as much for plants as a 20-20-20 based fertilizer.
In the end, the “competition” between the two kinds of fish fertilizers, complete with varying claims of relative effectiveness, seems a little silly. We see them as complimentary products, rather than fertilizers directly competing with each other. 5-1-1 Fish emulsion is great for a quick boost of Nitrogen, however being so high in Nitrogen, it’s not necessarily ideal alone as an everyday fertilizer.
Hydrolyzed fish fertilizers, like the 2-4-1 Neptune’s Harvest we’ve mentioned before, seem a bit more balanced and suitable for everyday use, therefore in our eyes they fall into a different category of use than fish emulsions. If anything, hydrolyzed fish ferts may be a little shy on nitrogen for optimum vegetative growth when growing hungry herbs like cannabis, so the occasional boost of from it’s 5-1-1 “cousin” is usually greatly appreciated.