Making homemade fish hydrolysate

Perhaps it's the cold weather and the general chilliness of the basement, but my fish hydrolysate experiment is not quite progressing as quickly as I'd like.  I followed the recipe for making this fish fertilizer on the Unconventional Farmer and it's supposed to take ~20 days to ferment, but  mine still looks like sludge.

Below is a series of the progression of the puréed rainbow trout, molasses, water, and lactobacillus mixture started on March 2:

Day 1: Raw fish blended with water, molasses, and lactobacillus serum

I had decided to keep it in our basement as I expected the smell would probably get to be a bit intense, but with the fresh puree, there really wasn't much smell at all.

Day 7: purée separting liquids from semi-solids, along with batch of egg shell Cal Phos fertilizer

Day 14: not much difference, but seemingly less air pockets with the semi-solids

Day 21: decided to move upstairs to laundry room to warm it up and hopefully accelerate the fermentation process

I have tried shaking the bottle a bit to get the contents to mix a little better and put more of the fish purée into direct contact with the lactobacillus, but it still smells awful and still has visible chunks.  Looking at the bottom liquid, it's actually more viscous than I would have expected.  I've never actually seen fish hydrolysate, but I'm wondering if it is actually more gelatinous when it is a finished product.  It is supposed to be great source of nitrogen for plants and is used in compost tea to boost the fungal content, so I imagine it will be great for the fruit trees, if I can get it to properly ferment.  Does anyone have experience with making/ using fish hydrolysate in their garden?  Any advice?