Yes, go ahead, I screened the laterite first, so only the granules went in.
I kept the dust for when I pot plants in my Discus tanks.

I have added laterite to an existing tank during a 50% waterchange, I
moved the gravel aside form the base of my amazon swords, and dropped the
laterite right in, covered it with my sand/gravel and completed the water
change. Water did not cloud.

"Dan Norgard" wrote in
:

Ok, I'm new at this...last tank I had was 45 years ago. Now I think
I've jumped the gun. I have a 29 gal. tank with 'natural' gravel and
I planted several varieties straight into the gravel. I just have 3
small fish right now.
The question is: Can I move the gravel aside and insert the Laterite
around the plants without turning the water to mud?
Thanks,
Dan