Sand not bare bottom

[reef fish]

hello family
Am restarting my system and it a bare bottom because of the high flow rate of 2 steams 3 I have tried up to 2.0 mm grane size like there look of it with sand if anyone can help tank size is 124 gallon
48x30x20

 

[mjlash22]

If you are asking for a recommendation on grain size I would say the higher the better for tanks with a high flow rate. I use caribbsea special grade in my Reefer 525 which has 2 MP40's pushing a lot of water around. Hardly any sand movement.

 

[reef fish]

What’s the grain size for sspecial grade ?
The last one I used was 2 mm if I can remember correctly

 

[mjlash22]

What’s the grain size for sspecial grade ?
The last one I used was 2 mm if I can remember correctly

1-2mm range. If you’re looking for more than 2mm, their natural reef and Florida crushed coral is 3+mm. You could also look up other brands. Tropic eden is another popular sand brand.