Sand size question

Orm Embar

New member
OK, am researching different sand grain sizes and am trying to figure out what the finest sand that doesn't get blown around is. Background - planning on mixed reef, not blasting water flow like a SPS tank.

Per Advanced Aquarist, coarse (2 mm) sediments did have more phosphate than fine (0.2 mm) sediments.

From what I have read, sand < 1 mm in size tends to get blown around a lot.

So . . . are people trying to stay right around 1 mm for grain size? My thoughts are to stick to just under 1 mm to just over 1 mm, but I don't know what fits that criteria (I'm concerned that coarser sediments will trap food/detritus and am assuming that after the biofilms develop there will be relatively little sand going anywhere unless I have a lot of flow directed at the sandbed.

From what I've read, most pple tend to use the 0.5-1.5 mm sands (Caribsea Aragamax Select, Caribsea Fiji Pink) for fine stuff and 1-1.7 mm sands (Caribsea Special Grade) and coarser for high flow tanks.
 
If you believe Ron Shimek's article here:

http://www.ronshimek.com/deep_sand_beds.html

you should be using "sediments whose particles generally range from about 1/16th mm (0.063mm) to about 1/8th mm (0.125 mm)", which would be the sugar sized or oolitic substrate. Many reefers I know mix the oolitic with the seafloor special grade at about 4:1.
 
Back
Top