Laterite and gravel

I am in the process of re-setting up a 55 gallon tank that I hope to 
have heavily planted and probably with Discus (at least some Amazon, 
acid water loving fish).
I purchased two pounds of Laterite from Thiel Aqua Tech and mixed it 
with 100 pounds of small gravel today. I mixed it with the bottom 50 
pounds of the gravel.

My questions are: did I use too much Laterite and when, if ever will my
tank get uncloudy from the Laterite? and

Is Laterite compatible with Discus or the other acid water fish?

Thanks for your help.

Floyd Grant  (in little  ELk City, Oklahoma).