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Old 03-15-2005, 02:12 PM   #1
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Deep Sand Bed Overkill?

I've had a 30xh reef set up for about 2 years now. In the tank their is a DSB of about 6.5 to 7 inches and about 5 to 6 inches in 20g refuguim. After about 3 months from setting up the tank I have never registered any nitrates in the tank and I have used several different test kits. However I only notice activity(coloration and worm tubes) about 4 inches down in the DSB. I want to upgrade to a 75 soon and was wondering if the bottom half of the DSB is just going to waste? In which case I will just go for 3 to 4 inches. Any input would be appreciated.

Thanks
Karl
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Old 03-15-2005, 02:20 PM   #2
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Of course it really wouldn't be a "DSB" without that bottom half!!

The purpose of a DSB is to provide areas of low or nil oxygen for the conversion of nitrate to nitrogen gas. Seems like your DSB is working as intended.
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30 gal standard 55 lbs LR, 60 lb live sand, 10 gal sump/refugium. Urchin skimmer, mag7 pump, 3 x 96W PC combination 10,000K/actinic bulb, 2 blue LED moonlights
SG 1.024, temp 79.5, pH 8.4

Livestock I added:

1 skunk cleaner. 12 hermits: red, scarlet, blue. 15 or so assorted snails. Discosomas, Ricordia, Rhodactis mushroom corals, chaetomorpha (sump), 1 feather duster, Montipora digitata, Montipora capricornis, Montipora hispids. assorted zoos, Xenia, Kenya tree coral, green Sinularia, green star polyps, branching hammer coral, bubble coral, Devil's hand leather. Yellow chromis, purple firefish.

Hitchhikers: the usual suspects :crabs, bristles, urchin, mantis shrimp (now in exile in mantis tank)

List of possible/likely newcomers:

Feather duster. PJ cardinal, Bangghai cardinal, Firefish goby, Clownfish, Neon goby, Yellow watchman goby, Orchid dottyback. Various corals.
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Old 03-15-2005, 06:33 PM   #3
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Sounds like it's working as prescribed, I wouldnt change a thing.
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Old 03-15-2005, 06:39 PM   #4
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Is it that usefull? I also have a 30gl for 4 years and I only have about 1" of sand... I also NEVER saw any nitrate...
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