Hang on back vs. sponge filters?

[M0oN]

What do you folks use on your tanks, what do you prefer?

Have any of you switched from one to the other, if so what are your reasons?

[Carol_Roberts]

air driven sponges for fry HOB (aqua clear) for everybody else

[RyanH]

Some may consider it overkill but I use both on all of my tanks. I will usually keep an extra sponge or two running in case a project comes up where I need instant biological filtration.

[susankay1]

I agree with Ryan. I run both along with extra sponges just in case I have a surprise like this.

[Discusthing]

Excuse me for cutting in...Carol, do you use the same for your cichlids?

For the discus I am using both AC and sponge.

[Carol_Roberts]

I run two Aqua clear 500's on the 135 gallon african tank