When I lived in the midwest I collect barrels of fallen leaves in the fall, and soaked them.

Even if the leaves don't reduce pH (because of tap waters alkalinity) the tannins may be beneficial for your type fish,
I also added leaf litter to tanks.
The leaves below are magnolia.

Key holes are often found in nature in habitats strewn with leaf litter.

Even if the leaves don't reduce pH (because of tap waters alkalinity) the tannins may be beneficial for your type fish,
I also added leaf litter to tanks.
The leaves below are magnolia.

Key holes are often found in nature in habitats strewn with leaf litter.

