Colloidal Silver has much less if any side effects. Tastes like water. Can be inhaled into lungs with a nebulizer, taken orally, or even used in the eyes. Ionic Silver (another form of Colloidal Silver ) can rejuvenate tissue.
I use a silver puppy to make mine for nothing. Their is no need to go above 20 ppm as it is more important to have smaller particles instead of more particles. If you go above 20 ppm you will have agglomeration and will also have to add stabilizers to keep the particles in suspension which can cause Argyria.
Some claim Ionic will build up in the body but this study says otherwise.