Depends on tank size Jenna. MP 40's are powerful. Ecotech stands by their products better than anyone other manufacturer that I have dealt with. They will usually "hook you up" long after your product is out of warranty.
Thanks! Good to know that they stand by their products.
I would still need 2 powerheads if I get a big tank, maybe a 60-70g, correct? how long does a powerhead usually last?