"Wayne Sallee" wrote in message
...
he said the borrowing animals "rasps"
could expose the anaerobic
bacteria and cause the ammonia to spike in a dsb.

That's stupid.

Yes a 45 is a small tank, but I'd put it at least 2 inches. Just keep in
mind that the deeper you make it , the better, but the deeper you make it,
the more space it will take up. I like to make it shallower in the front,
and deeper in the back. Use a nice fine calcium sand.

Wayne Sallee



thanks wayne, will do!



jthread wrote on 11/4/2007 2:50 PM:
Some of you had recommended a dsb for lowering nitrates and i said the
lfs told me not to. I said something about nitrogen bubbles and... well
i'm a nubee and was basically talkin' out my bottom and this is what the
lfs said.

Paraphrase: They only recommend 1" of a sand bed "on small tanks" due
lack of real-estate. He didn't say anything about borrowing animal
releasing the bubbles he said the borrowing animals "rasps" could expose
the anaerobic bacteria and cause the ammonia to spike in a dsb. He did
say something about nitrogen bubbles but i don't remember the context.

I'm learning. Sorry for the confusion

I'm considering a dsb in my 45 gal tall tank as it has room. How many
inches do you suggest?

Jim