I'm looking for a powerhead that I can effectively run in unison with my XP3 canister filter. I'd also like for the powerhead to oxygenate the water so biological filtration improves.
Do powerheads need an air pump hooked up to them to oxygenate the water or do they do that themselves? I'm strongly leaning toward the Aquaclear 70 powerhead. I see a clear plastic tube coming off of it in the picture, does that mean it does indeed need and external air pump? If so, how powerful of an air pump is needed?
Thank you


