I've been planning on building a tall thin slate cave/structure for my 40g to help diffuse some of the water cascading into the tank from the HOB
(I know there are other ways of making the filter softer and such but I'd like to keep the filtration strong just diffuse some of the current.)
Where can I pick up thin/medium sized slate?
-I live in the middle of a city and there are no quarries around me, even though I probably wouldn't trust picking up rock anyway.
I've also heard people use GE I 100% Silicon is that the most aquarium safe adhesive or is there something else I should pick up?
Thanks for the help =D!