I did some quick reading. I think the Silica product is close enough to be the same as DE. (For some reason, I thought DE was an enzyme....sorry about that!)Years ago, I use to take a similar silica product that you want. I got mine at health food stores and had no idea it was a form of DE. Here's a quote that I found on DE:
”Diatomaceous earth is a mineral product mined from the fossilized silica shell remains of unicellular or colonial algae from the class Bacillariaphyccae, better known as diatoms “
Dogs 1 T. per day in daily ration for dogs over 55 lbs., 1 tsp. per day in ration for small dogs and puppies, rub powder at full strength into the coat for fleas and sprinkle on bedding
Cats 1 tsp. per daily ration, rub at full strength into coat for fleas and sprinkle on bedding
Diatomaceous Earth can be used as a dust or spray for control of flies and other insects in buildings, on pastures, crops and trees.