The Demon King
A big black crow landed near
Staring me in the eye
Bold he was, showing no fear
And startling me with his cry
Who was he to yell at me?
Not once, not twice, but thrice
I stared back, hoping he'd flee
But would settle for him being nice
He cocked his head, eyes now glowing red
Hopping not once, not twice, but thrice
Again, screeching like the dead
Insisting only my leaving would suffice
I should say some of them do dig through sand, but not as deep or violent as other catfish, and pygmy corys tend to hang out in the middle of tanks, cleaning of plants and rocks. I plan on getting pygmy corys... or possibly panda corys. They sift sand more than dig.
Yes, but it has its own problems, not being suitable for some plants etc. And, it is very expensive, as in astronomical for large tanks like mine. I am doing the Walstadt Method--- where Diane Walstadt recommends organic potting soil covered in two inches of sand. There are variations, with some recommending 3 inches of sand or gravel over an inch to two inches of dirt. I'm going with 1.5 inches of dirt and 2.5 inches of 2mm sand.