Red Soil & Green Sand -A Question for Aussies and Hawaiians - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 06-17-2012, 02:29 PM Thread Starter
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Red Soil & Green Sand -A Question for Aussies and Hawaiians

Aussies first.

Have any of you used the red soil common to certain parts of Oz as a substrate ?



Hawaiians have any of you used the black sand or green sand from Papakōlea Beach (also known as Green Sand Beach or Mahana Beach) as a substrate ?


If you have relate your experiences please.
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post #2 of 10 (permalink) Old 08-16-2012, 02:14 PM Thread Starter
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post #3 of 10 (permalink) Old 08-16-2012, 06:15 PM
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I'm from Northern New Mexico and have used the local red dirt as substrate for toad bogs. I was told by a geologist friend that certain areas are almost identical in composition to soil found in Australia and I believe Spain. I really don't know how well it would do as a planted tank substrate, but it's beautiful! I imagine the Hawai'ian sand would be fine, since all of the Hawai'ian islands are volcanic and volcanic rock is inert.
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post #4 of 10 (permalink) Old 08-17-2012, 03:03 AM
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i believe it is illegal to take sand from hawaii's beaches. and that green sand is due to the mineral olivine (magnesium iron silicate), forms in basaltic rock, which the entire hawaiian chain is (or was) primarily comprised of.

as for black sand, it is pulverized a a lava; as such, i believe in pele's wrath, and i would not dare to remove it from the beach, illegal or not.
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post #5 of 10 (permalink) Old 08-17-2012, 01:55 PM
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That is so cool that it's an actual law protecting the beaches. Otherwise I think people would be collecting sand in droves. I assumed it had already been collected. Which island are you on?
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post #6 of 10 (permalink) Old 08-18-2012, 03:21 AM
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I'm not sure if it's illegal to take it from the beaches of hawaii cuz I know you can buy little bottles of the sand at gift shops there
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post #7 of 10 (permalink) Old 08-18-2012, 04:27 AM
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Buying from a local shop is a little different from taking it off the beach.


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post #8 of 10 (permalink) Old 08-18-2012, 05:01 AM
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it's considered very bad luck if you remove stuff, especially lava rocks from 'historically sensitive' areas, for lack a of a better term. I don't live on the big island, i.e. the one with all the volcanic activity, but there's a mountain on Oahu called the Pali where a very bloody battle was waged in ancient times. There's a lot of ancient temples remaining there as well. I personally don't collect anything from there- plants, rocks, dirt, whatever. Partly out of respect, partly out of superstition. Either way, just doesn't seem right.

On the other hand, some places, like the tourist dist. is all landfill anyway. None of that beach was there hundreds of years ago. So it's different if you bought a bit of waikiki home to take with you. Even if it was black or olivine: you can get permits for anything these days, if you've got the dough. Also, I think you need 4wd to get down to that beach.

Ironically I can answer the first question though: there is a lot of red dirt here, i.e. in my yard, and it saves the need to mineralize my top soil because it's basically pure clay. Isn't the stuff in australia red colored sand, though?

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post #9 of 10 (permalink) Old 08-18-2012, 05:47 AM
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There are definitely beaches in hawaii where it is illegal to collect the sand.

That black sand beach is a big no no.

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post #10 of 10 (permalink) Old 08-18-2012, 06:24 AM
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Quote:
Originally Posted by NateFank View Post
I'm not sure if it's illegal to take it from the beaches of hawaii cuz I know you can buy little bottles of the sand at gift shops there
didn't notice the "made in china" sticker? it is illegal to take sand for use in commercial activities. up to 1 gal per day is allowed for "reasonable, personal, noncommercial use". anyway, most of the sand on the older islands is calcium carbonate, so it wouldn't be suitable for planted tanks.
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