Are These Rocks Ok To Be In My Tank?

[mike_nofx]

Hi, i collected these rocks for my new tank, which is now one day into cycling. I didnt think if the rocks could be harmful or not till now. can anyone tell me what they are, and if they are ok??
they are non lfs. and i did wash them before putting them in the tank (water only) if they are no good i can always start the cycle again no probs.
thanks

 

[Tempestuousfury]

Hmm, not exactly sure what kind of rock that is. The_Wolf'll be by any minute to help you out, I'm sure. Just to spite him, I suggest you go to the link in his sig before he suggests it.

A simple test would be to scratch the rocks and put vinegar on the scratch. If it fizzes, it's a no-go.

 

[SamUK]

heres the rock thread.

http/www.fishforums.net/index.php?showtopic=55806

 

[mike_nofx]

What category of rock would mine fall under??

 

[SamUK]

not sure to be honest.


the rocks you have look pretty much the same as some of the ones i used in my community tank.

can seem them here...

some at the back and on the left.


if there the same then my tanks fine.

i do have some sandstone there which apparently i shouldnt.

 

[HendrixTheOscar]

These rocks seem fine as there are no sharp edges etc. It looks like it's going to be a great tank. I wish i could find some decent stuff like bogwood and rocks that are cheap or free cos everything seems too expensive for pieces of wood etc.

Yours is cool, i hope you stock it with exotic varieties and keep us all posted on it.

Cheers, Pete

 

[mike_nofx]

Yeah ive got black ghost knife, will be getting some nice fish to go with it.

that small pot plant will be coming out, its used for cycling purposes (along with ammonia of course) i doubt it does much as its so small.

The driftwood cost me $80 AUD which i think is expensive for 'wood' but i really liked it....

 

[Saedcantas]

Heya,

In general river/beach washed pebbles with nice rounded edges all over have already been in water for some time and will probably be safe for your fishtank. They look like a mixture of well weathered sandstones to me, the major potential problem when using sandstones in aquaria is if they are unprocessed or unweathered, some (but not all) sandstones have a calcite cement between the clasts (grains). In this case that problem has more than likely been done away with from the actions of being in water already

Not a problem with them at all in my opinion

 

[The-Wolf]

they all look like granite boulders to me
the second to last pic (the one with the lines it in)
concerns me the most. the lines could be caused by a seam of iron ore in it and that could lead to problems as it breaks down.

 

[Saedcantas]

I mean absolutely no offence The Wolf, as I see you are viewed by all as the in house rocks expert, but I genuinely dont believe that any of those rocks with the possible exception of the first look anything like a granite.
Granite as a rock type contains at least three primary minerals (Quartz, Biotite Mica and Feldspars - Plagioclase and/or Orthoclase) and in all honesty none of those rocks look like any typical granite I have ever seen.

As for the rock with the cracks in it; In my opinion those are more than likely the resultant shape left when softer minerals such as Barites in mineral veins are weathered out faster than the ground rock of the pebble.


But nevertheless, this is poor geology, good rock type composition diagnosis would have the benefits of more in roads than just a visual
The long and short is that I personally think all of those rocks are completely safe for your use.

Lotte***

 

[The-Wolf]

I mean absolutely no offence The Wolf

no taken. I am by no means even an amature geologists
I gain most of my rock info from the depths of google.
I will always bow to those that have superiour knowlage in such areas.