Resurrecting, because I don’t know what I’m doing 👍
I have seen that very heavy rocks will weigh down the aquarium enough that it pushes down the aquarium mat the aquarium sits on. This is on top of a reasonable deep sand bed and egg creates. I can’t believe this is safe; as it’s creating further pressure at bottom seams. In deep aquariums this could be disastrous.
I think this can be alleviated by introducing more rocks to have a more uniform weight across the base, but in short 20kg+ rocks are difficult to distribute imo. Heavy rocks should never not be resting directly on egg crates as sand/gravel supports aren’t static. This crates a smaller area of pressure.
I’ve got shy of 200kgs of rocks that I’d like to use in an aquarium, but mostly stacked in one corner - any suggestions?