silca / non silca sand

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carolines100

Feeder Fish
MFK Member
Feb 23, 2008
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just reading through the 12 tips and it says non silca sand for rays

a) whats the difference

b) why not have it for rays
 
It's made of glass and can be abrasive. For Rays, it pretty much turns their disc red and kills them pretty quick.. Some tend to tolerate it from what I've heard, but not worth risking it.
 
a resl fine silica sand would be ok but ill stick barebottom...
 
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