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Pink Fiji sand with corydoras

Hokieokieamy

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Hey guys,

I got a new tank and sand...not realizing how coarse the sand is AFTER putting it in the tank. :( it’s a 0.5-1mm sand, do you think this is too coarse for my corys?


If so...would I be able to make do by replacing half the sand, rather than all of it? What’s your favorite sand for corys?

thanks!!

-concerned Cory lover
 

essjay

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If it is at all sharp it isn't good for cories. They feed by taking in mouthfuls of sand, sifting it for food then expelling the sand through their gills. Besides any damage to their mouths and barbels, sharp sand will also damage their gills.

Mixing the sand won't work either as they'll still take up some of the sharp sand. If you mean put a layer of something on top of the sharp sand, they would mix together quite quickly.

The best sand - and the cheapest - is play sand (unless you are in Australia where I understand play sand can also have sharp bits).



Edit to add - I have just googled pink fiji sand, and came up with the one made by Caribsea. Is this what you have? If it is, are you aware they make it for marine tanks rather than freshwater? I don't know if this means that it shouldn't be used in fresh water tanks, but if it is the Caribsea sand I would change it for something else.
 
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Byron

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Agree, and can confirm. According to CaribSea's website, their marine sands are aragonite, and these will dissolve calcium and magnesium to raise GH, KH and pH. Not good in freshwater unless you were keeping hard water-requiring species like livebearers.

And this sand is too rough, going from the photos on their site.

Aquarium sands are very expensive. Play Sand (except for the Australian issue essjay mentioned) is ideal, inexpensive, natural, and completely safe. I have it in all my tanks now and the cories are thriving.
 

Aussie_Bristle

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Agree, and can confirm. According to CaribSea's website, their marine sands are aragonite, and these will dissolve calcium and magnesium to raise GH, KH and pH. Not good in freshwater unless you were keeping hard water-requiring species like livebearers.

And this sand is too rough, going from the photos on their site.

Aquarium sands are very expensive. Play Sand (except for the Australian issue essjay mentioned) is ideal, inexpensive, natural, and completely safe. I have it in all my tanks now and the cories are thriving.

Total agree about the Aussie sand here. A lot of our play sand is full of crushed coral and shells which is too dangerous for bottom dwellers. When I had the turtles it was the same as it could do internal damage. I used riversand and also use in my tanks now, it’s very fine and free of the coarser particles like in our Australian playsand. My cories go crazy in it easy to sift through and soft on their bristles.
 
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