Tropical Fish Keeping - Aquarium fish care and resources

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austinspeer810 12-07-2012 10:55 PM

How Much Gravel?
How many pounds of gravel do I need for a 20 gallon tank? I am getting a new tank for christmas and I need to know how much gravel I need

OhNoFive0 12-07-2012 11:08 PM

depends how deep you want it, no live plants, means less substrate, but about 15 lbs will get you there unless you want a really deep substrate.

austinspeer810 12-07-2012 11:26 PM

i plan on putting ALL real plants.

Bluewind 12-08-2012 12:48 AM

Most people believe in 1-2lb per gallon. Since you will have plants, have you settled on gravel or are other substrates and option? I have pool filter sand in mine and although it took a lot of rinsing, it is a good substrate for plants (about corse seasalt sized granules) and it's VERY cheep! About $8-10 for 50lbs! You can find it at any pool supply store :-D
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Byron 12-09-2012 06:56 PM

As you are starting new with this 20g, I would also consider fish, as some have a substrate preference. Sand works best for the fish who like to browse over and into the substrate, such as corys, loaches. Plants grow well in sand or fine gravel. Darker rather than lighter is best for fish.

In a 20g you don't want more than 2 inches depth overall, meaning when spread evenly, for fine gravel; sand is probably better at 1.5 inches. You can build this up a bit more in the back if larger plants need it.


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