slate rocks, whch ones are ok for tank? - The Planted Tank Forum
 
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post #1 of 15 (permalink) Old 05-16-2008, 06:42 PM Thread Starter
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slate rocks, whch ones are ok for tank?

i need some slate to tie moss and ricca to.
they sell slate here but dont know which one to get? are they all safe for the aquarium, some wil chip or flake off easily. i see several differnet colors and some seem harder than others.
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post #2 of 15 (permalink) Old 05-16-2008, 07:31 PM
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I'm pretty sure all slate is safe for aquarium use but I'd try and avoid the flaky stuff just because of the mess it would make and the sharp edges it has.
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post #3 of 15 (permalink) Old 05-16-2008, 08:05 PM
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[IMG]. Due to its thermal stability and chemical inertness, slate has been used for laboratory bench tops and for billiard table tops.[/IMG]


http://en.wikipedia.org/wiki/Slate

hope that helps!
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post #4 of 15 (permalink) Old 05-16-2008, 08:07 PM
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slate should be fine. if you are really worried just pore some vinegar over it, if it fizzes then it isn't safe if aquarium

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post #5 of 15 (permalink) Old 05-16-2008, 08:07 PM
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[IMG]Slate will not alter the chemistry of water (except in the slate containing feldspar which may leach silicates into the water resulting in excess diatom growth in marine aquaria).[/IMG]

i guess watch out for feldspar
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post #6 of 15 (permalink) Old 05-16-2008, 11:29 PM Thread Starter
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Here are the rocks i got today, i just did the vinegar test and they didnt bubble etc. this veneer slate was 0.20 a lb cheap. it has some white coloring and brown etc in the cross section. i managed to scrub most of the brown off with a wire brush. i hope this will be ok for fish or shrimps. i havent put anyting on it yet im still wainting for someoen to tell me something bad lol.













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post #7 of 15 (permalink) Old 05-17-2008, 02:30 AM
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I doubt it would leech anything toxic but you might want to keep an eye on your kH and gH just to make sure that it doesn't affect your water parameters too much.





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post #8 of 15 (permalink) Old 05-17-2008, 02:52 AM Thread Starter
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yeah i dont want that to happen, im waitin for someone who knows about slate rocks before put these in the tanks!

i dont know rocks lol
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post #9 of 15 (permalink) Old 05-17-2008, 03:37 AM Thread Starter
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Quote:
Originally Posted by honor View Post
[IMG]. Due to its thermal stability and chemical inertness, slate has been used for laboratory bench tops and for billiard table tops.[/IMG]


http://en.wikipedia.org/wiki/Slate

hope that helps!
heres the rest of wikipedias slate defenition


Slate is mainly composed of quartz and muscovite or illite, often along with biotite, chlorite, hematite, and pyrite along with, less frequently, apatite, graphite, kaolin, magnetite, tourmaline, or zircon as well as feldspar.

how do i know whats in it? and what it will do to the water? might take it back and try to find pure colored pieces
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post #10 of 15 (permalink) Old 05-17-2008, 03:57 AM
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Personally, unless you already have rock-hard water and any additional TDS could send you over the edge of what plants can grow in, I'd probably give them a try.

Even if they do leech some TDS, doing weekly 50% PWC should be enough to keep in in check. Carbonates are what will drive up TDS very quickly, and you already pretty much ruled that out with the vinegar test.

Muriatic acid would be another test you could run... but personally I wouldn't even bother- I'd try it





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post #11 of 15 (permalink) Old 05-17-2008, 04:00 AM Thread Starter
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my waters gh is 150 ppm now. hard
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post #12 of 15 (permalink) Old 05-17-2008, 04:18 AM
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OK in that case maybe I wouldnt... I bet you could find some nice granite in your area though?





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post #13 of 15 (permalink) Old 05-17-2008, 06:17 AM
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you could always put it in a bucket for a week or two to see how it affects the water hardness and such

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post #14 of 15 (permalink) Old 05-17-2008, 11:41 AM
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hi geologist here by looking at you photos it looks to me that your slates are nice metamorphosed shale that has a simple vain of QTz so i would say its safe for a tank. i use very similar in aperence slates in my tank and have no problem with solubitity of the silicates. but if you dont trust them soak them for a week and check water peramiters
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post #15 of 15 (permalink) Old 05-17-2008, 02:01 PM Thread Starter
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thanks for the replys, im gonna put them in a bucket check the gh,kh and check it again in a few days, thanks
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