I’ve ran pro tek, heavy16 prime(potassium silicate), aptus facilitator, vitalize by mills and power si. I’ve seen a noticeable difference between potassium silicate and silicic acid without a doubt. I thought it was all hype but I’ve tried power si’s bloom formula for a few months now and it’s without a doubt helped the stacking in flower a lot. I imagine that being partly based on the aminos and kelp they add in it but it’s worked for me. Silicic acid also has proven benefits over potassium silicate when foliar sprayed. It has shown to increase yield and help prevent bug and disease infestations at a higher rate than potassium silicate. I add the original power si into my veg sprays now as well