Fertilizer question

I have a fertilizer 4-8-8 to use for my plant.

Is this a good ratio for the early veg stage?

Also I put some in my water and it's not completely soluble, some dissolved and turned the water a pinkish color and left hard pieces in the bottom.

Is it ok to use? I know its reccomend to use a water soluble nutrient but I wanted to trying what I have on hand before buying anything else.

If you have a back-up plan in case things go south, give it a shot. Start with low dosage and go from there.