The Planted Tank Forum - View Single Post - Are these rocks safe for a planted tank?
View Single Post
post #28 of (permalink) Old 02-11-2013, 05:06 AM
Planted Tank Guru
lochaber's Avatar
PTrader: (1/100%)
Join Date: Jan 2012
Location: Oakland, CA
Posts: 2,318
huh, maybe they are excavating inside.

Sounds like it might be what you found.
lochaber is offline  
For the best viewing experience please update your browser to Google Chrome