AquascapingDiscuss aquascaping designs and techniques as well as get critiques on your aquascaping pictures. Find out how to use aquatic plants, reefs, and wood to design a planted aquarium.
It's very difficult to identify a rock on sight alone and even more difficult to be confident about doing it.
That said, the rocks look like limestone to me. Dolomite would also be a reasonable possibility. If either ID is correct then the stones would increase KH and hardness.
I am nowhere near a geologist, but those look like igneous rocks to me. Extrusive, maybe, since I can't see the grains. Those nooks and crannies could be the result of some type of folding, but they look more volcanic in origin to me, especially the last sequence. Also, if the rocks were made of carbonate, I would certainly put some sort of warning in there about their inappropriateness for some types of freshwater aquariums. Just a thought,
That depends on a lot of factors. A pure, porous, fine-grained limestone (chalk) will have a far faster effect then a coarse, impure, solid limestone.
For the most part, limestone is not a good idea in a CO2-injected tank. It can cause both GH and KH to drift significantly. Drifting GH may not be a problem, but drifting KH could be. In a tank with a CO2 controller rising KH could conceivably kill fish.
The same thing can be said for dolomite though generally dolomite will be less reactive than limestone.
In a tank without CO2 injection there may not be a very signficant effect from either limestone or dolomite. Or maybe there will be.
Given the effort it takes to organize an aquascape around a set of stones it is best to avoid stones that can have any effect. If the stones do have a undesirable effect then removing and replacing the stones means that you have lost the aquascape and the effort it took to build it.
After many researches, i found this rock! A retailer, tropical fish specialist near from Montreal (Quebec, Canada) located in Laval have this rock called "dragon rock", used by Takashi Amano. This rock is taken from a chinese mountain. I send an order by e-mail and bought few pieces. Great! The same as the picture...
i think they are the only one to sell theses rock in Canada.
Oups..i forgot, the store is AquaPassion.
(here the link : www.aquapassion.com)
I hope it will help you.
If it isn't the Chinese Dragon rock, perhaps an ash deposit that is very high in iron and manganese known as "scoria". You would know if it dissolves.
larry chu
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