sandbed setup in saltwater aquarium
sand bed setup in a salt water aquarium. should you use a shallow or deep sand bed. What type of sand will you use? I prefer non live sand. Most sand you buy in the sealed bags is mostly dead because it has been sealed in a bag! This can have die-off, which is dead or partial-rotting of what was once alive. When you add this to your tank, it can spike your nitrates a bit. This is not good since you don't want nitrates in your tank to begin with. I like starting with non live sand and let the bacteria build over time naturally. I also use non-crushed coral sand.
Crushed coral sand holds onto the nitrates. This video shows what sand I use and how I put the sand bed down. I will usually go with a shallow sand bed. A deep sand bed is good for the break down of nitrates but if you stir that sand bed up, and let those gases escape into your tank, that can be very bad! www.rottertube.com
Dead sand, in the aquarium trade, refers to sand that has not been populated by beneficial bacteria and other organisms, unlike live sand. Adding a culture of nutrifying bacteria to a well-aerated, wet sand bed can usually produce live sand.
A deep sand bed is commonly defined as a bed of fine sand with a minimum depth of four to six inches which ensures that a portion of the sand at the bottom will not be exposed to significant circulation of water. An established deep sand bed consists of sand populated with bacteria, algae and other marine organisms such as worms, crabs, snails and stars. The creatures burrow and overturn the top two to three inches of sand in search of food, which causes water to circulate deeper in the sand than it would if the creatures were not present.
Deep sand beds may be made of a variety of materials, but typically fine or "superfine" sand is used, with a grain size between
1 mm and
0.05 mm. A larger particle size increases circulation, which in turn requires greater depth to establish anaerobic areas. Larger particles can also inhibit the burrowing of small animals, which would limit circulation into the bed. Additionally, larger particles (2 mm or larger) are prone to detritus accumulation, which necessitates periodic siphon cleaning.
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