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Old 05-10-2011, 01:08 AM   #1
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Deep sand beds?

What's the general consensus on sand beds? How many inches should you have on a 40? Would they still be beneficial if there wasn't a sump system just a canister filter?

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Old 05-10-2011, 01:14 AM   #2
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Depends on whether you want one really. DSB in a fuge is a lot more common. If you have sand sifters or jawfish you're going to want a DSB of at least 4"

It is definitely beneficial regardless of whether you have a sump. You can get away with a somewhat deep sand bed without appearing to be a deep sand bed.

At the front of the tank start off from 1.5-2" and work your way up to 4 inches at the back end. This helps detritus collect from the front and gives a ton of room for sandsifters and beneficial bacteria.

But in all honestly a DSB isn't necessary. Try to have at least a 1.5-2" sand bed and rest any base rock on the bottom of the tank before you add the sand for stable foundations.

In my 24g I have 2" in the front and 4 in the back, but it doesn't appear deep at all.

Just make sure you have something to aerate it every once in a while like nassarius snails, bristle stars (though not until tank is mature and even then...meh) or a sand sifting goby.

The sand bed doesn't need to be pure live sand by the way. You could mix 10-20 pounds of live sand with aragonite and have pretty much the same result. Just for the love of the oceans do not use beach sand or playbox sand O_o

Display tank - 24g nano w/ softies/montipora

I run electrical appliances underwater and enjoy injecting things with Kalk filled syringes.
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Old 05-10-2011, 10:18 AM   #3
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I have now a 6" DSB in my sump, and I can tell from all other things having stayed the same, the nitrates did get lowered, and I do believe it helps.
I guess if you dont have a sump but want to have a deeper sand bed, you should definitely do like Sarcothelia described, having the sand deeper towards the back of the tank.
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