Hi all

[DavidK]

Just wondering is there anyway to inject soil under substrate in established tank without turning water dirty?
Thanks

[Allen]

There's the frozen soil trick. Never tried myself.

[JLW]

Drill a hole through the bottom of the tank. QUICKLY add the soil, then cap it.
Best I got.

[Becca]

I've frozen substrate before as a way to get it under existing substrate without making a huge mess. Works best itf you do it during a WC while the water level is low.