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  1. #1
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    Question LOW $$$ 33g oyster shells experiment

    OK! I'm going to do an experiment with a 33g tank.

    I'm going to use crushed oyster shells (I can get at my local feed COOP) as the substrate and I will also be putting in only home made rocks. I will cycle the tank adding my own amonia (like I do with FW tanks).

    This should be a very low cost startup. (If it works.....)

    Any comments or tips ???????
    P.S. I'm french so I never make any typos......they are actual mistakes :sorry:
    I'm not in a rush.....but I am on a budget! :bigcry:

  2. #2
    Senior Member Swimfins's Avatar
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    Make sure your homemade rock is well cured. It can raise ph if its not.
    Canons shooting coconut creme
    40 guns in a steady stream. :coolmad:

  3. #3
    Senior Member StephG's Avatar
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    I'm curious about this. What guide (or guides) will you be following to make your rock? I've read a few articles on GARF about this.

    I'll be building a 90-150G tank within the next 2 years and I'd like to build some rock for that tank.

  4. #4
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    Mostly GARF. It's so easy. 4 or 5 cups of crushed oyster shells to 1 cup portland ciment. Add water to give it a cottage cheese texture. Mold it in a box of damped oyster shells. Leave it there for a day or two. Switch to a big container of fresh water to cure. Change water often. When you think the curring is done, change the water and check PH. If it asn't move in a week.......your OK. Put in salt water and do the same one week test.

    You can get the oyster shells at Ritchies Feed and Seed.
    They are not as nice as the rock you can get at the LFS. But for the price....and after they are covered with corraline and stuff..... The best thing is that you can give them the shape you need.

    I'm talking about this as if I was an expert.......and my first batch is not even curred yet.:silly: But there is alot more to come.
    P.S. I'm french so I never make any typos......they are actual mistakes :sorry:
    I'm not in a rush.....but I am on a budget! :bigcry:

  5. #5
    Senior Member clown_fish's Avatar
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    I've made a bunch ~100lbs using:

    - 3 part oyster shells from local feed farm i.e. Richie
    - 1 part whilte silica sand ( you can use south down or crush coral)
    - 1 part water
    - 1 part cement ( type 10) from Home Depot

    Curing time for me around 4 months give or take with weekly water change.
    90G bb mixed reef set up in April 2005. I had 40g mixed reef for one year before that

  6. #6
    Senior Member badmedicine's Avatar
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    I am getting intersted in this home made rock thing. Does anybody have any pix of mature "home grown".
    Also I would like to know how to find oyster shells- what else are they used for?
    Why would a feed supply carry them?

    Can this cure by exposure to air (left in the garage over the winter?)

    What is the average cost to create about 50kg
    thanks again!
    I have a lot of Patients

  7. #7
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    Any place that have stuff to feed poultry should carry oyster shells.

    The curring as to be done in water. So all the PH boosting stuff can get out of the cement.

    The curing is not to make the cement hard, it's to gate your cement to stop pushing your PH up.......belive me, it will push it wayyyyyy up.
    P.S. I'm french so I never make any typos......they are actual mistakes :sorry:
    I'm not in a rush.....but I am on a budget! :bigcry:

  8. #8
    Senior Member ronmax86's Avatar
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    Oh oh oh I know, I know

    They feed oyster shells to chickens for ruffage (helps in the gizard for digestion)

    Water helps the curing process, I haven't heard of it curing in open air. I know the freezing and thawing wouldn't be good for it.

    I second the call for pics!
    Ron N

  9. #9
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    Go to the GARF web site ...... plenty of PICs there.
    P.S. I'm french so I never make any typos......they are actual mistakes :sorry:
    I'm not in a rush.....but I am on a budget! :bigcry:

  10. #10
    Senior Member tictoc's Avatar
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    I'm gonna make some soon....then I have a small river that runs by my house so I'm gonna toss em in there then i'll take em out sometime in the next few months and toss em in a water bin to check the ph.
    Any darn fool can make something complex; it takes a genius to make something simple

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