How much substrate is to much?

goraman

Junior Poster
Oct 10, 2012
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My tank is 36 gallons.
I started with 50 pounds of white sand.
Added 15lbs. Fluorite.
3.5 lbs. Literate by API
15 lbs course sand
4 inches deep.
Is this over kill?
Or is there a benifit in having this much depth as I don't see this much in other tanks?
What is the blue gray at the bottom of the white sand ? Could it be from both Florish and API Root Tabs? as I have used them alot at least 40 tabs in all over 4 months.
 
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