ok ok i guss its just time i guess but really ,,,tink about it ,,,its dA new century here and brick can got additives i mean am not saying that i wont use it but still il just TRY to avoid cus it look all industrial looking
Bricks are made of clay or slate and are baked at 1200 degrees so I will take my chances with them over cement blocks. I promise you they're far cleaner than any natural stone or driftwood. As long as they pass the acid test they are good to go.
Bricks are made from natural materials, fired at high heat. Here's a link on how bricks are made if you want to check it out
I see no problem using bricks in an aquarium. You can use cinder blocks and cement in a tank as well, providing they're soaked and go through multiple water changes until the pH settles down. Many people create cave-like backgrounds in their tanks for cichlids using polystyrene covered with cement - as long as you do things correctly, it's not at all dangerous to fish.
Hmmm I just had a thought concerning terra cotta bricks. Ever notice what color they are...? Like red....specifically "rust red"....and in IRON oxide red... Does anyone know if they use iron oxide to color red bricks? I wonder if they would add any iron to the water...?