all from wikipediaLimestone often contains variable amounts of silica in the form of chert or flint, as well as varying amounts of clay, silt and sand as disseminations, nodules, or layers within the rock. The primary source of the calcite in limestone is most commonly marine organisms. These organisms secrete shells that settle out of the water column and are deposited on ocean floors as pelagic ooze or alternatively is conglomerated in a coral reef (see lysocline for information on calcite dissolution). Secondary calcite may also be deposited by supersaturated meteoric waters (groundwater that precipitates the material in caves). This produces speleothems such as stalagmites and stalactites. Another form taken by calcite is that of oolites (oolitic limestone) which can be recognized by its granular appearance. Limestone makes up about 10% of the total volume of all sedimentary rocks
Tell us more about the limestone I have some experience with lime rock some good some bad. Where is it coming from & a pic would be a big help.wondering if it is safe to mix about 70 pounds of limestone with about 40 pounds of live rock?
Ditto.Why do you want to use so much limestone rather then live rock? The main problem I see with using limestone is that it is more dense then live rock and you wont get benefits of the filtration that live rock can provide for you. The outside may appear the same over time, but it wont be the same in terms of filtration.
Why do you want to use so much limestone rather then live rock?
because it is 30 cents per pound and im just using it as base rock 2 part LR one part Limestone
Hows that Limestone working out for ya? I have some that I THINK is limestone that I am curing now for my tank. I will post some pictures of it when I can. But it is FULL of holes and crazy caves, it really looks like it would make awesome life rock if it works out.