Substrate or no Substrate?

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jrgilles

Well-known member
Joined
Dec 4, 2009
Messages
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Location
Seattle, Washington, United States
So, I have everything set up now and am going to fill my tank with water this weekend.

The setup is:
75 gallon display
50 gallon sump
20 gallon fuge.

I was planning on putting a deep sand bed, 6-8" deep in the fuge, and live rock. Then in the display tank I was going to put down some crushed coral, just enough to cover the bottom for looks, and live rock, then I was going to fill my sump with live rock.


From what I read, this seemed like a decent plan. I just spent a few hours at a friends house who has a couple of beautiful coral tanks, and he thinks a DSB in the fuge is a bad idea. I guess he has had some substrate issues in the past where the substrate actually over time becomes a nitrate trap and said it is a pain in the butt to deal with.

His tanks were all bare bottom, including his 30 gallon fuge. His fuge was just full of live rock and algae, and seemed to be doing its job well. There were tons of copepods swimming around in the algae and on the live rock (which I'm going to take a bit of to seed my tank/fuge)

What do you guys think about substrate for my tank setup? Am I better to leave out the DSB and go bare bottom, or bare bottom with a small amount of crushed coral for looks?

He showed my how easy it was to clean the bare bottom tank, by just blowing off the bottom with a power head and catching it in a filter sock on the drain line (which he would just put on the drain before cleaning, and remove immediately afterwards.)

Goes against some of the research I've read online where they say the DSB is great at removing nitrates, but he's been in the hobby a long time and has some beautiful tanks and crazy equipment, so I'm apt to take his advice and not go DSB, but would love to hear what you guys think about this...

rob
 
I recommend higher flow if your going to be bare bottom. I imo it would be a nitrate factory if you put rubble in your display.
 
I like sand in the display. Just seems more natural to me. My fuge has a 4" DSB, a little LR rubble and chaeto. I think the trick with a DSB is having enough flow over it to keep the detritus in suspension and if you have snails and other critters (nassarius, cerith, bristle worms etc..) in there, they will stir up the top layer just enough to keep things healthy. If you have a DSB not enough flow and no critters, you will have problems.
 
awesome. thanks again for your opinions.

What I've decided to do is bare bottom in the fuge and a small amount of sand in display. I got 2 - 20# bags, so I think that will give me maybe a half inch. I'll put in some critters to keep it clean. Then I'll just fill everything up with live rock and should be in good shape.

My fuge is slow flow, so I will forgo my original plans of a DSB, and just fill it up with live rock and cheto.

That will be my starting point anyway. Thanks again!

rob
 
Personally I would forgoe putting any LR in the fuge. All they do is trap detritus and make maintenace a chore. JMHO though.
 
Hmm, ok. Good info. I'm setting up my fuge outside the stand on a display stand, but maybe I'll just put a small amount in for appearanced, but keep it minimal to keep cleaning easy.

Will save me some bucks on LR if I don't fill that tank up too. Thanks!

rob
 
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