oyster shell question - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 02-03-2006, 02:18 AM Thread Starter
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oyster shell question

Hey guys how much oyster shell should I put in my 70 G's canister filter?
I have 6" piece of shell.
??
Botia
ps my tap water is 6.9 and low kh

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post #2 of 7 (permalink) Old 02-03-2006, 05:36 AM
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All of it like around ~ 1/4 cup in volume... I would consider getting some small pea sized crushed coral and a small media bag instead... The oyster will work, but the cc will work faster. I use to put three or four 3 inch plus oyster shell (halves) in my XP3 and still wound up with calcium deficiency, even though the KH was OK, or so my test showed.

I'm sold on crushed coral now, at .99 per pound at the LFS. Of course oysters taste great. But no more calcium deficiency at least, if I'm careful. My tap is like zero KH GH, however and 5.2 pH before I power head it, so take that in mind.





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post #3 of 7 (permalink) Old 02-04-2006, 02:55 PM Thread Starter
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Well I had put the shell in 4 days ago.
My plant growth has exploded. I must have been having a major deficiency of calcium. My plants are now growing much more solid looking and my twisted val's that never got past 4 inches are have added 2 inches in a week and half.
I can't beleive the difference.
I'd imagine there is also alot of other trace elements coming in from the shell too.
I hope my neighbour does not spot me borrowing shells from her garden...(strange decoration idea)
Botia

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post #4 of 7 (permalink) Old 02-04-2006, 11:09 PM
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Botia, I never realized, you live close to me. I am in Deep Cove.

On the water issue, I obviously have the same problem. I use 1/3 cup cc in my XP3. This seems to keep the KH at about 5-7 and lasts nearly 3 months (only a few flakes left at filter cleaning time).

I add some baking soda to my water change water.

I think that cc would pretty well release quite a few elements as it melts. Mg and Ca are the givens, but what else?
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post #5 of 7 (permalink) Old 02-05-2006, 06:59 AM
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Check your local phone book and see if there is a farm or tractor supply store near you. You can usually buy bags of oyster shell there cheap.

I havenít used it in a planted tank, but I have used it to make agrocrete (fake live rock).
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post #6 of 7 (permalink) Old 02-06-2006, 03:18 PM Thread Starter
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No need as we live 5 mins from the pacific ocean
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Quote:
Originally Posted by Keck
Check your local phone book and see if there is a farm or tractor supply store near you. You can usually buy bags of oyster shell there cheap.

I havenít used it in a planted tank, but I have used it to make agrocrete (fake live rock).

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post #7 of 7 (permalink) Old 02-06-2006, 03:22 PM Thread Starter
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I use baking soda too but I am trying avoid so much salt in my tank. After three days of the whole shell my kh spiked to 120 ppm 6.72dkh. I've since taken half out. This seems to be the ticket.
Deepcove huh nice place..
Botia

Quote:
Originally Posted by putty
Botia, I never realized, you live close to me. I am in Deep Cove.

On the water issue, I obviously have the same problem. I use 1/3 cup cc in my XP3. This seems to keep the KH at about 5-7 and lasts nearly 3 months (only a few flakes left at filter cleaning time).

I add some baking soda to my water change water.

I think that cc would pretty well release quite a few elements as it melts. Mg and Ca are the givens, but what else?

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36 Watts Nicrew Led Mod.
Seachem Onyx sand
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