@iceman2494 and everyone else, in reference to the specific ratio between Si and Ca.
From that LinkedIn article I posted before.
"Even if a grower is adding a silica supplement (not in silicic acid form), virtually all of the silica remains in the growing medium until it is converted, which can take many weeks to months for any meaningful conversion."
This is referring to soil but it's a good indicator that silica needs to be available to the plant right from the get go if calcium is going to be able to take advantage of it throughout the grow.
After a bit of reading and understanding/remembering that calcium is rarely, if ever a toxicity problem, I don't think we need to worry about there being something bad about having a lot of Ca available to plant. I think the part to pay attention to is having the right amount of the right kind of silica available to cause the plant to take optimal advantage of the available Ca and all of the other nutes it helps to increase uptake into the plant.
My research today says to use potassium silicate. As you'll read in this article, we don't want additional salts or any heavy metals from our addition of silicate.
"Botanicare’s Silica Blast, which contains sodium silicate, potash and potassium silicate.
Note also that
Botanicare is now owned by Scotts Miracle-Gro, so it’s best to avoid all Botanicare products.
You already know why any product with sodium silicate is not good for your medical marijuana plants– too much salt."
I'm glad I found this because I was leaning toward Silica Blast. What we want to use is
Advanced Nutrients, Rhino Skin.
It can also be used as a foliar spray.
"Foliar spraying potassium silicate is a preventive against powdery mildew, mites, thrips, aphids, heat, gray mold and other stress that attacks your plants from the outside."
https://bigbudsmag.com/marijuana-growers-use-potassium-silicate-br-to-get-more-thc-trichomes/