[zachtos]

I picked up a used 300G DD tank from a hobbyist in WI. It has 4 holes in tank bottom, dual overflow. These are small holes (wish you would use bigger for more flow!)

Can I drill the bottom or sides? It is supposedly low iron glass front/sides. Not sure what the bottom or back is, but there are 1" holes in bottom corners.

*I know it would violate warranty, but not sure if it's under warranty now or not after owner change 3 times now.