Gravel in pocket - SanDisk Sansa m240 MP3 Player

3.94 × 10-6 / Pound
Gravel, Pea density in 285 measurement units

http://www.aqua-calc.com/page/density-table/substance/gravel-coma-and-blank-pea

There are several brand and varieties of gravel to choose from. I would be more than happy to post some of the more preferred brands here for you; however the choice is not so simple. Make sure you know what kind of gravel you need for the type of tank you have.

http://www.petsmart.com/product/index.jsp?productId=3577442

http://www.petco.com/product/112362/CaribSea-Instant-Aquarium-Crystal-River-Gravel.aspx

http://www.aquariumguys.com/gravel.html

It is most likely that the gravel you are using contains calcium and magnesium. This will ultimately cause the pH level in your tank to rise. You should use an inert gravel such as Swell Harlequin Gravel.

http://www.swelluk.com/aquarium/substrate-1695/gravel-1829/swell-harlequin-gravel-blue-376469.html

The most effective way to keep your gravel clean is by using gravel cleaner. I suggest investing in a heavy duty syphon-powered cleaner and use it once a week to help keep your tank clean.

When filling your aquarium, you will be doing so according to depth. Most people prefer a 2" depth of gravel in their tanks. Bags of gravel/sand are sold by weight however so you will need to calculate the volume you need and multiply it by the weight of a liter of the gravel you choose.

Most gravel sold today are pre-washed although gravel can accumulate grit in transit as the grains rub together therefore it is advise to wash them.

The reason for that is because many colored gravels are made from white dolomite which contains calcium and magnesium. In order to maintain the PH level you should get inert gravel.

Yes, if there is no gravel in your aquarium, there are not bacteria colonies because they can only thrive in gravel environment, therefor you need to replace the water more often.

The gravel provides a home for beneficial bacteria which help dispose waste products in your aquarium, and the useful colonies of bacteria can only thrive in gravel.

You have a few different options for cleaning the gravel inyour aquarium:1. 1. Remove the gravel from the aquarium and washit thoroughly in a strainer, under warm tap water. Depending on the number of fish you have,this should generally be done once every other week. Do not wash the gravel with any chemical orsubstance as this could be damaging to the fish!2. 2. Use a store bought orhomemade gravel/substrate vacuum. Thisallows you to clean the gravel without having to remove it from the tank.3. 3. Use only a thin layer of gravel on the bottomof your tank and exchange with new gravel each time it needs to be replaced.