is this rock ok?

[goda]

well i have a 12 gallon aquapod and a 130 gallon salt water tank. the 130 was never finished ( i got it for 500 bucks including tank stand and canopy ... couldent pass it up)
anyways on with the story

i have the 12 gallon tank and everything was happy and fine ( xenia and shrimp were in it)
untill got sick and went to the hospital for a week and the shrimp died.....
well i decided now that i want to finish the 130 since it should be a lot less picky about maintance. quest ion is can i use the old coral rock i find out side in the tank ( construction next door is digging a lot up) and then i can just seed the rock with figi rock

i live in south fl so it is the CACO3 rock


anyways.. how should i clean it .. would putting it in the tank and running it with heavy carbon / skimming be good enough?

 

[WaterKeeper]

You can use coral rock as base rock. An easy method to clean it is to soak it in a fairly strong solution of vinegar. This will remove a thin film from the outside. Then rinse it well and soak in in FW for a few more days. It is base rock so you'll need to place true LR in the tank if you want it to become active.

 

[goda]

you dont thinik there will be any chemicals from the construction site


also there is several different types of rock over there. some i can tell are old corals but others have a more....... yellow ish look i guess and look more like real rock..but this is fl so everything here is from an old reef so i guess that should be ok also

what about the sand. think it is mostly silicat or more like reef sand that has buffering capabilitys