Drilling Hagen Tanks

[BC-reefer]

Does anyone know if the bottom of Hagen Tanks are tempered or not?

[Fishman]

typically depends on size ... you can do the old "polarized" sun glass trick to tell, or better yet - DRILL THE BACK and not the bottom.

[SuperFudge]

No, they are not tempered.

[fkshiu]

I checked with Hagen itself and was informed that their tanks are NOT tempered.