Rock hard crushed coral sand bed

[mosseo]

I tore down my 120gal salt tank and now well over half the tank is 2” ‘s of rock-hard crushed coral. Large chunks of base rock are also infused within it.
I used to dose 55ml of powdered Red Sea Alkalinity and 25ml of powdered Red Sea Calcium.
Any suggestions on how to remove it without using a chisel? I’m trying to soak it in straight water but so far it hasn’t made any difference.

Thanks

 

[wvned]

Your only other option would be to dissolve it with an acid like vinegar or muriatic acid. They have 30% vinegar at Home Depot.
I would add water until it is covered by a couple of inches and then add 1/2 gallon of the vinegar and let it sit.
Or
remove as much of the water as you can and pour the vinegar across it in a strip and try to weaken spots enough to break it up.

 

[griss]

Your only other option would be to dissolve it with an acid like vinegar or muriatic acid. They have 30% vinegar at Home Depot.
I would add water until it is covered by a couple of inches and then add 1/2 gallon of the vinegar and let it sit.
Or
remove as much of the water as you can and pour the vinegar across it in a strip and try to weaken spots enough to break it up.

This is what I would recommend as well.