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http://indianaquariumhobbyist.com/community/ :: View topic - identifying river sand?
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identifying river sand?

 
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rogus
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PostPosted: Wed Nov 15, 2006 3:50 pm Post subject: identifying river sand? Reply with quote

 There  is  a  construction  work  going  near  my  house  and  I  can  see  some  unused  sand  discarded  on  the  side  of  the  road.  How  can  I  tell  that  its  river  sand  and  not  beach  sand?  What  is  the  difference?
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sandeepraghuvanshi
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PostPosted: Wed Nov 15, 2006 4:09 pm Post subject: Re: identifying river sand? Reply with quote

 Hi
 It  is  the  size  of  sand  particles  whichis  more  important,  if  they  are  between  2-3  mm,  they  aer  okay.
 Normally  particles  of  this  size  are  sieved  out  and  not  used  in  construction,  most  of  the  times  you  can  get  it  for  free.
 Take  some  Cleaning  acid  and  put  some  drops  in  sand,  it  should  not  fizzle.
 Just  wash  it  very  properly,  lots  of  time  by  water,  do  not  use  soap  etc.
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PC
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PostPosted: Wed Nov 15, 2006 4:15 pm Post subject: Re: identifying river sand? Reply with quote

 during  construction,  the  sand  is  sieved  to  remove  the  stones  and  this  gravel  is  just  discarded  -  in  Tamil  its  called  "Kuppy"(rhymes  with  Guppy)  why  dont  you  leave  the  sand  alone  and  take  this  instead?
 
 I  think  thats  a  better  alternative  than  sand,  which  however  finely  washed  in  my  opinion  still  throws  up  debris  when  disturbed  by  bottom  dwellers.
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rogus
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PostPosted: Wed Nov 15, 2006 4:39 pm Post subject: Re: identifying river sand? Reply with quote

 Sandeep,
 Without  doing  the  acid  test,  is  it  safe  to  assume  that  sand  next  to  a  construction  site  will  always  be  river  sand?
 
 Pradeep,
 The  discarded  sand  that  I  am  talking  about  still  appeared  a  little  too  fine  to  me,  esp  for  aquarium  use.  But  I  know  what  you  talking  about.  I  have  seen  them  seive  that  sand.  I  mean  to  talk  with  the  construction  workers  and  ask  them  to  keep  aside  the  coarse  granules.
 
 One  other  thing.  My  house  is  located  on  a  rocky  terrain  which  I  think  is  very  rich  in  laterite.  If  anyone  has  been  to  Goa,  they  will  know  what  I  am  talking  about.  I  talked  with  a  colleague  of  mine  who  is  a  chemist  and  has  analysed  that  rock  in  particular.  I  asked  him  if  adding  that  rock  in  water  will  cause  increase  in  water  hardness.  He  replied  that  it  will  not,  if  anything  it  will  make  it  lighter.  Assuming  he  is  correct,  can  I  just  use  coarse  granules  of  this  rock  as  the  entire  substrate?  Maybe  mixed  with  a  bit  of  river  sand.  
 
 The  excavator  at  the  construction  site  is  constantly  digging  its  way  through  the  rock.  You  can  get  really  rich  red  brown  pieces  of  that  rock  in  all  kinds  of  sizes.
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natbox
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PostPosted: Wed Nov 15, 2006 6:51 pm Post subject: Re: identifying river sand? Reply with quote

 river  sand  is  really  fine  and  can  be  easily  disturbed  by  bootom  dwellers  and  other  big  fish  or  excessive  flow  of  water  currents  near  the  bottom.the  left  over  sand  from  construction  sites  is  really  good  as  a  substrate  but  u  have  a  wash  a  lot  before  u  put'em  in  the  tank  as  they  cloud  the  water  .but  if  u  have  a  good  internal  filter  then  don't  worry  too  much  because  the  water  will  clear  over  a  day  or  two  .but  i  rather  say  tht  wash  extremely  well  b4  putting  them  !they  are  excellent  and  free  alternatives  than  other  substrates  .u  can  add  a  thin  layer  of  red  sand  over  a  layer  thin  layer  of  the  sand  being  used  as  substrate  and  cover  it  with  a  thicker  layer  of  the  subtrate  so  tht  the  red  sand  is  wedged  bwtn  the  two  layers.
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nature_lover
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PostPosted: Fri Nov 17, 2006 8:30 am Post subject: Re: identifying river sand? Reply with quote

                                                   
rogus  wrote  (View  Post):                
Sandeep,
 Without  doing  the  acid  test,  is  it  safe  to  assume  that  sand  next  to  a  construction  site  will  always  be  river  sand?
                 

 
 I  think  it  is  quite  safe  to  assume  construction  sand  to  be  river  sand.  Beach  sand  is  not  used  in  construction  because  the  salt  content  will  corrode  iron  and  will  make  structures  weak  and  brittle.
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