Copied Right from Dyna gro web site.
Pro-Tekt 0 - 0 - 3 The Silicon Solution is a silicon supplement, supplies higher levels of potassium and silicon to build stronger plant cell walls, providing a Pro-Tekt-ive barrier against piercing sucking insects and invading fungi. Pro-Tekt reduces disease and insect problems, increase stem strength and leaf positioning, which improves photosynthesis. It also increases heat, drought and cold tolerance. Use as a supplement with any fertilizer to provide non-toxic preventative protection against fungal infections and insect infestations. Recommended for all plants.
Consider it a flu shot for your plant, not "needed" but sure does not hurt. I use dyna-gro protek for ph up, and humic acid for ph down, they both help the plant in different ways but is not critical if you do not use them. With some playing around I have a "PH "perfect mix" as I do not have to adjust ph as the formula mix does it for me. The dyna-gro runs about $50 a gallon but I use 1-5 ml per gallon so it lasts a r-e-a-l-l-y long time.
