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http://indianaquariumhobbyist.com/community/ :: View topic - Salinity in marine aquariums???
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Salinity in marine aquariums???
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Ashwin
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PostPosted: Fri Sep 05, 2008 3:01 pm Post subject: Salinity in marine aquariums??? Reply with quote

 Hi,
      What  is  the  salinity  maintained  you  guys  in  your  marine  aquarium???
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psimhan
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PostPosted: Fri Sep 05, 2008 3:09 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 What  kind  of  marine  aquarium  are  you  talking  about?
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Ashwin
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PostPosted: Fri Sep 05, 2008 3:15 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Well,  i  am  sort  of  new  to  this,  probably  regular  reef  tanks......  to  house  damsels,  clownfish,  anemone  fish  etc.  I  came  across  a  tank,  where  28ppt  was  maintained,  he  had  no  fish  by  some  anemones...  so  i  wanted  to  know
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psimhan
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PostPosted: Fri Sep 05, 2008 3:22 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Keeping  1.030  as  the  benchmark,  you  can  go  down  to  about  1.020  for  Fish  only  aquariums,  up  to  1.035  for  FOWLR,  reef  aquariums.
 Again  reduce  the  salinity  a  bit  in  warmer  temperatures.  
 Lots  of  variables  in  this  but  1.030  is  your  middle.
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Kaushik
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PostPosted: Fri Sep 05, 2008 3:29 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Dear  Ashwin
 Salanity  in  Sea  water  is  around  35ppt,  So  the  specific  gravity  of  Sea  water  at  35ppt  is  1.026.  Thereby  teh  SG  range  for  a  marine  aquarium  is  vary  from  1.020  to  1.030.Hope  it  will  clear  your  doubt.
 Regards
 Kaushik
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Ashwin
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PostPosted: Fri Sep 05, 2008 3:56 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Thanks  guys...  been  of  great  help
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psimhan
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PostPosted: Fri Sep 05, 2008 4:03 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Sorry,  I  am  a  bit  off  today.  
 1.025,  1.026,  1.027  is  your  mid  range,  not  1.030.
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Shankar
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PostPosted: Sat Sep 06, 2008 10:38 am Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Someone  enlighten  me  the  difference  between  Salinity  and  Specific  Gravity.  And  the  significance  of  the  marginal  difference  of  levels  for  FO  and  Reef  tanks.
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nash81
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PostPosted: Sat Sep 06, 2008 2:25 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 I  am  wondering  what  is  a  regular  reef  tank.
 
 What  you  mentioned  there  is  a  FO  tank.  Cause  you  dont  talk  of  corals.  If  there  are  no  corals,  no  LR,  then  its  not  really  a  Reef  tank.
 
 Salinity  depends  on  where  your  live  stock  comes  from.  I  usually  recommend  that  incase  you  are  planning  a  FO  setup.  Initially  keep  your  salinity  low  cause  most  lfs  from  where  you  buy  your  fish  from  keep  low  salinity  to  keep  diseases  at  a  low.  I  would  suggest  you  start  with  1.020  and  gradually  move  it  up  to  about  1.023/4.  Also  note  the  this  is  at  an  ideal  temperature  of  25deg.  In  most  cases  our  tank  temp  if  we  dont  use  a  chiller  in  summer  months  is  must  higher  and  during  such  time  the  salinity  should  be  kept  lower.  I  would  keep  it  at  1.020  if  my  temp  is  29deg.
 
 Now  when  we  talk  of  reef  setups  we  cant  really  have  a  varying  salinity  cause  most  of  your  live  stock  and  inverts  are  sensitive  to  salinity  changes.  Which  is  why  reef  setups  need  a  lot  of  time,  patience  and  knowledge.
 
 If  you  never  had  experience  keeping  fish  and  still  wanna  go  for  a  marine  setup  i  would  say  first  read  a  lot,  make  sure  you  are  able  to  provide  for  their  needs,  start  with  hardy  fish  like  damsels,  clowns  and  then  gradually  as  u  gain  experience  move  up  the  hoby  to  an  eventual  reef  may  be  5-6yrs  down  the  line.
 
 Cheers
 nirav
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rasikanayak
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PostPosted: Sat Sep 06, 2008 2:38 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

                                                   
Shankar  wrote  (View  Post):                
Someone  enlighten  me  the  difference  between  Salinity  and  Specific  Gravity.  And  the  significance  of  the  marginal  difference  of  levels  for  FO  and  Reef  tanks.                

 
 I  do  not  have  a  marine  aquarium,  But  intend  to  have  one  shortly.  Smile  
 The  explanation  for  the  above  question  to  Shankar  will  help  me  too.
 
 Regards,
 Nayak.
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winrai
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PostPosted: Sun Sep 07, 2008 3:30 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Hi  there,
      Things  are  getting  clearer...  for  me,  what  is  the  equipment  used  to  test  SG  of  the  marine  water??  SG  water  is  primarily  the  density  of  of  water.  Coral  reef's  have  virtually  stable  salinity  or  SG  as  there  is  no  rivers  that  get  fresh  water  to  any  reef  to  dilute  the  salinity,  and  all  the  reef  fishes  are  stenohaline"   they  do  not  have  a  long  term  tolerance  to  changes  in  salinity  from  their  natural  one"  you  may  be  able  to  keep  them  at  lower  salinity  by  acclimatization,  but  what  about  the  long  term  effects  on  the  physiology  of  the  fish.
 
   The  LFS  may  probably  keep  the  fish  at  lower  salinity  to  avoid  disease  problems,  that  is  because  even  the  pathogens  of  these  fishes  are  stenohaline  and  may  not  be  virulent  at  lower  Salinity.
 
 Marine  tank  is  a  system  over  which  it  is  difficult  to  get  absolute  control  over,  it  is  continuous  learning  experience.  as  the  parameters  which  you  will  have  get  control  over  are  too  many.  Well  we  guys  have  to  start  somewhere
 
 Thanks  guys....  please  keep  the  thread  running  as  the  information  it  is  giving  is  quite  valuable
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Shankar
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PostPosted: Sun Sep 07, 2008 3:39 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

                                                   
winrai  wrote  (View  Post):                
 what  is  the  equipment  used  to  test  SG  of  the  marine  water??                

 
 Hydrometer  -  Floating  and  Dial  type.  I  found  Kare's  hydrometer  to  be  the  most  accurate  among  the  Dials.  Lab-grade  floating  ones  are  good  too.
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Ashwin
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PostPosted: Sun Sep 07, 2008 8:20 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Thanks  Shankar,
       I  will  look  out  for  one
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PostPosted: Tue Sep 09, 2008 9:03 pm Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Salinity  is  the  amount  of  salt  in  the  water,  this  is  measured  in  parts  per  thousand.  ie  35  grams  of  salt  in  1  lit  of  water.
 
 SG  specific  gravity  is  a  way  of  measuring  salinity,  since  SG  increases  in  propotion  of  salinity
 
 
 there  are  more  acurate  way's  of  measuring  salinity  ex:  refracto  meter.
 
 We  need  to  measure  SG  at  25  celcius  to  get  a  accurate  value  of  salinity.  As  the  temperatre  of  the  water  you  are  measuring  increases  the  hydrometer  will  show  lower  value.  ex  if  the  hydrometer  shows  1.025  at  28  c  the  same  water  will  show  1.024  at  25  c.
 
 there  is  a  chart  available  to  find  the  salinity  correcponding  to  the  temperature.
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Shankar
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PostPosted: Wed Sep 10, 2008 10:13 am Post subject: Re: Salinity in marine aquariums??? Reply with quote

 Enlightened.  Thanks  anyways.   Very Happy
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