ianbo ianbo
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  • Joined: 24/8/2012 23:26
  • From Lancashire
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  • Posted on: 14/2/2013 19:33
oyster shells in filter to stabilse ph #1
I normally use pH buffer,however I have been led to believe that crushed oyster shells in the filter can hold the pH to 7.5.where I live rainfall keeps diluting Ph to a more acidic level.

I have some additive that looks like coral/shells that I bought a while ago and I thought I would try it .I normally buffer up at 7 pH to 7.5 but I feel it would be better not to have to so often.

Has anyone any experience of using this alternative to buffering.
Violet Violet
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  • Joined: 22/11/2008 17:42
  • From West Yorkshire
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  • Posted on: 14/2/2013 20:00
Re: oyster shells in filter to stabilse ph #2
Yes, I think quite a few people here with soft water who have harder water fish buffer up.

I don't have a pond, just a tank but I use bicarb of soda (do not confuse with baking soda) to raise KH, thus raising pH and epsom salts to increase GH.

Some crushed coral/oyster shell (in a baggy in the tank) to increase KH too, as whilst bicarb and epsom salts are instant for fresh water, the crushed shell works over a longer time period of course and gives (well in my tank certainly, an element of stability that I seemed to struggle with previously).
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ianbo ianbo
  • Not too shy to talk
  • Not too shy to talk
  • Joined: 24/8/2012 23:26
  • From Lancashire
  • Group: Registered Users Basic Membership
  • Posts: 26
  • Posted on: 14/2/2013 20:50
Re: oyster shells in filter to stabilse ph #3
Thanks Violet. I buffer it up normally but it is more the holding of the Ph over a longer period of time that I am interested in and I think the more stable conditions are the better for the fish. Food for thought.I will give it a try
Thanks
Violet Violet
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  • Posted on: 14/2/2013 20:54
Re: oyster shells in filter to stabilse ph #4
Will defo work

I use about 3 large heaped soup spoons or so in the 180 litre in the end of a pop sock.

Not sure how much you would need given pond size (quite a bit though) but start with less and add gradually over a few weeks would be my advice. You can track it that way and pH increases should be done gradually of course.
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