[ThomasB]

When using gravel how thick should it be? With the gas bubbles and all how thick to try and control it. Or just do vacuuming more often. It's a 125 gal it will house peacocks and haps.

 

[Deeda]

I like to use enough substrate so it's just above the plastic trim on the bottom of the tank, this can range from 1" to 1.5 inches.

I actually prefer using a sand substrate since I find it more natural and the fish seem to enjoy picking it up and moving it around.