powerhead magnets
 

so i got a couple new PH's for the new tank im setting up ( 130 G ) and am finding that the powerhead magnets are not strong enough with the thickness of glass i have. is there a way around this little issue? or are there stronger larger magnets a person can get for these things? im using a couple new hydor 750,s with a couple other PH's i have on my 75G once changed over to the 130G