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Old 08-05-2016, 08:41 AM   #1
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Rock usage in marine tank

Hello I've recently purchased this rock from a garden center and wondered if I could use this for my marine tank. I'm not sure of its structure, could be limestone but could be something else. I think my question is really can I use any type of rock in the marine aquarium ?

Any advice would be great, thanks.

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Old 08-05-2016, 09:19 AM   #2
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This is just my opinion but I would say you would be taking a risk as you don't know what sort of chemistry reaction it will take with the salt water.


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Old 08-05-2016, 09:42 AM   #3
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Thanks, It just seems a cool rock and would look good in the tank. It's a new tank set up so I don't really have anything in to crash other than the other live rocks in the tank so I may give it a go.

The rock was made for freshwater tropical fish.
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Old 08-05-2016, 10:14 AM   #4
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Does look like limestone with the pitting. Have you tried putting any acid on it? If it is more magnesite or dolomite you might need to leave the acid on the rock (eg in a depression or cavity) and check after a bit for any bubbles.

Also check nothing has been sprayed on it I guess. Eg weed killers.
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Old 08-05-2016, 10:28 AM   #5
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Thanks Delapool, I did think it was limestone and will try the old vinegar test when I have chance to confirm.

The garden center had a fresh water tropical fish section so I suspect it will be clean of any weedkiller. I'm more concerned about the composite of the rock i.e any metals that could contaminate the tank. I am correct in thinking that if it is limestone it will be okay to add to the tank?
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Old 08-05-2016, 10:36 AM   #6
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Is there any kind of tag on it that might tell you what the composition is?
If not that one maybe another on the stand.
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Old 08-05-2016, 10:38 AM   #7
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I'd need a salty to double check but can't see any problems and should be fairly stable.

What sort of elements are issues for saltwater?
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Old 08-05-2016, 10:40 AM   #8
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Rock usage in marine tank

Apparently from what I gather limestone if that's what it is can be used in a marine system They do say there is different varieties some have more heavier metals in them but other than that can be used but would advise to keep an eye out on your PH in the beginning.


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Old 08-05-2016, 10:47 AM   #9
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The only think gI have to go on Melosu is on the receipt I have 'Yellow spongy Aquar Rock' which doesn't help.

I'm knew at Marine Delapool but I think copper really bad.

That's great Tap Water, hopefully it's limestone. it seems a good rock to add my corals to
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Old 08-05-2016, 11:03 AM   #10
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Rock usage in marine tank

Quote:
Originally Posted by AlexMafi View Post
The only think gI have to go on Melosu is on the receipt I have 'Yellow spongy Aquar Rock' which doesn't help.

I'm knew at Marine Delapool but I think copper really bad.

That's great Tap Water, hopefully it's limestone. it seems a good rock to add my corals to

Lol, that is kind of vague. They should all be labelled properly imo (climb off soap box).

If they provide it for cichlid tanks that might help. I don't keep SW at all, so can only really offer thoughts on what the rock might be.
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