glass thickness and power heads

[bobble28]

Im tearing down my 90gal and downsizing to a 40b, im wanting to use my 2 biggest powerheads on the 40b the magnets are rated up to 1/2" glass..my question will these crack the glass on the 40b if i use them?

Thanks

 

[Reefing Madness]

No, they will not crack the glass. They have rubber backings, right?

 

[bobble28]

They have rubber on the wet side and felt on the dry side..

Thanks

 

[JMSKI333]

If they are rated "up to" 1/2" then I would imagine anything less then 1/2" is fine. What kind of power head are we talking?

 

[Reefing Madness]

Your quite alright using those on your new tank.

 

[bobble28]

Jbj 1600gph