yeah looks really heavy

What was the purpose of adding them?

the purpose of adding the rock, outside of being artistic, is to give haven for the fish especially any fry

small fish and fry thrive on the crevices of rocks; it's natural instinct for small or fry to hide, to seek refuge regardless if actually threatened by another tankmate or not, it is where they go

looks to me jweb did his fish a great benefit. I know if i were a fish I'd love to hide in between that rock, it's so cool.

great job jweb