Corys and Sand - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 05-23-2007, 04:52 AM Thread Starter
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Corys and Sand

I'm working out the details for moving up to a 75-gallon tank and I've got three corydoras adolfi, four panda corys and one speckled in my 29-gallon tank now. I read something on the net about sand being a bad substrate for corys because it erodes their barbels. My first impression would be that corys love the sand. Is anybody keeping corys with a sand substrate and would like to commnet on that warning.

Any suggestions on the substrate other than soilmaster or sand would be welcome.

Andrew, MASI Treasurer

This message is always under construction: 75-gallon tank; 2, Eheim 2026 filters - one twice broken; Tek Light with 4, 54W T5s (6000K) ; Sand on top of 4:1 sand:clay mixture; Milwaukee CO2 controller; PlantGuild vortex CO2 reactor; pH = 6.6, kH=70mg/l, GH=120mg/l; EI; Flourish excel on 50% weekly water change: AGA Member.
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post #2 of 12 (permalink) Old 05-23-2007, 11:58 AM
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Corys love sand, and it's a good substrate for barbel health. They like to dig around. What's bag for cories is bare bottom. Any substrate has a beneficial bacterial colony for cories which bare bottom tanks are lacking, and sand is one of the best substrates.

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post #3 of 12 (permalink) Old 05-25-2007, 07:37 PM
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Corys are best in sand. They dig and root, and kick it up everywhere...overnight it looks like I have "footprints" all over the bottom of the tank. Their barbels grow long and healthy. It is chipped, sharp gravel or rock that erodes the barbels.
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post #4 of 12 (permalink) Old 05-25-2007, 08:13 PM
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They like AS too.......

AS (except maybe Africana) is a very soft substrate, which would be perfect for them.

In college....so no aquariums for a while.....
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post #5 of 12 (permalink) Old 05-28-2007, 01:18 AM
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My cories love my sand. I wouldn't have anything else. I like it too.
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post #6 of 12 (permalink) Old 05-28-2007, 02:29 PM
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Cories do like nosing around in sand but some sands can definitely erode their barbels. Heavy sharpish stuff like pool filter sand should be avoided if you want to keep their barbels.
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post #7 of 12 (permalink) Old 05-28-2007, 05:36 PM
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Is there really such a thing as sharp sand? This is the first time I've heard about it.
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post #8 of 12 (permalink) Old 05-28-2007, 05:38 PM
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Some silica sands are supposedly "sharp" and have rough, fracted edges. Many sands, however, are spherical and smooth.

In college....so no aquariums for a while.....
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post #9 of 12 (permalink) Old 05-28-2007, 06:06 PM
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Quote:
Originally Posted by Zebrapl3co View Post
Is there really such a thing as sharp sand? This is the first time I've heard about it.
Yep. It's used in building trades (masonry, laying brick pavers, etc.) and horticulture.
http://davesgarden.com/terms/go/805/
http://www.google.com/search=define:Sharp+sand
What is sharp sand please?

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post #10 of 12 (permalink) Old 05-29-2007, 12:51 AM
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If you clean the sand with your hand running through it, the sharp stuff will even start to scrape on your nails.
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post #11 of 12 (permalink) Old 05-29-2007, 02:08 PM
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Thanks for the info guys. I will have to be more careful with my choice of sand selection in the future.
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post #12 of 12 (permalink) Old 05-30-2007, 03:28 AM Thread Starter
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What on the bag at a hardware store should alert me that the sand is sharp? Maybe it's best to bring a magnifier and look at it, but that may be too simple.

Andrew, MASI Treasurer

This message is always under construction: 75-gallon tank; 2, Eheim 2026 filters - one twice broken; Tek Light with 4, 54W T5s (6000K) ; Sand on top of 4:1 sand:clay mixture; Milwaukee CO2 controller; PlantGuild vortex CO2 reactor; pH = 6.6, kH=70mg/l, GH=120mg/l; EI; Flourish excel on 50% weekly water change: AGA Member.
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