syphon with live sand? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 16 Old 04-04-2007, 11:22 PM
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yeah i should have read his post closer, usually 1" sand beds are not common on reef.
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post #12 of 16 Old 04-08-2007, 01:07 AM
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How many lbs of sand do I really need to fill a 40lb tank to make 2-3 inches of sandbed?
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post #13 of 16 Old 04-08-2007, 06:14 AM
I would say about 2-40lb bags.
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post #14 of 16 Old 04-09-2007, 06:56 AM
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generally the rule of thumb is 1LB of sand to 1 Gallon of water. Now depending on the shape of your tank you may need to double that. Remember the thicker the bed of sand the finer that your sand particles should be so you dont make it possible for nitrate pockets.
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post #15 of 16 Old 04-09-2007, 07:37 AM Thread Starter
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I followed what my LFS recommended and went with 40lbs for my 38 gallon tank. This ended up being a little more than 1 inch sand bed. I have a rectangular tank.
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post #16 of 16 Old 04-09-2007, 11:46 AM
With a proper amount of flow in the tank (all to common is the lack there of) your 1" sand bed will be fine. It is typical for new reefers to get started using only an aesthetic sand bed and there is nothing wrong with that. The problems start around 3". Someone not familiar with the idea of how a live sand bed helps the tank might go in and disturb it regularly. One thing to keep in mind about a salt tank compared to a fresh tank is that there are jillions of organisms in the sand that EAT the left over detritus further breaking it down into coral food. However you need enough flow in the tank so that not all of the detritus lands on the floor and rots.

With a 1" sand bed I say turn it over by hand every few months or with each water change. The water will cloud up but will be fine in 24hours. This releases trapped bits for creatures to eat or be filtered out. No need to hassle yourself with trying to vacum it.

UNLESS you plan to run a heavy bioload fish only tank full of predators like lion fish or groupers, all would be a bad idea in a 40g tank. They will overwhelm the sand bed and pollute it quickly.
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