You are probably right. I just ordered pro v and cobalt power head
How big is your tank? BTW I use the Filter Max II connected to the powerhead to create flow along the bottom of the tank to keep it clean. Check out all the fittings in the pre-filter section. You can securely put the the powerhead on with these fittings and there are adapters and right angles, etc.
i disagree with rotor, squeeze the sponge into the water. beneficial bacteria lives on all surfaces in the tank, not just inside the filter. Squeezing it out helps spread the BB onto the substrate, decor etc.. and yes the fishes ammonia is what feeds the BB
these are perfect for breeder tanks, the fry will eat the trapped food off of the filter
Almost bought a foam filter. Went cheap with classic plastic POS for fry tank
the plastic ones that you put your own media in? those are fine for fry tanks. All the local fish stores use them or sponges