“LOVE Marco rock!
This foundation rock was perfect with a completely flat bottom, meaning you will definitely have a stable structure.
Easy to break into smaller pieces or even drill into using a tile-bit for frag plugs or to carve your own shapes.
Very porous for beneficial bacteria to populate.
Does need rinsing prior to use as dust will come off.
I definitely prefer this white colour than the pink/purple coraline-mimicking rocks.”