Scuba Oz said:The Fission by Current USA is the only small nano type skimmer that has any good reviews and they are inexpensive. In a nano as well as any marine setup, skimming is by far the most important thing, but dont take away the power of a water change, and good flow. Gas exchange will happen with good flow by breaking the water surface by aiming power heads up or towards each other to create turbulant water. Dont be afraid to create flow because the tank is small, remember reguardless of tank size you want no dead spots and 20-30x's turnover an hour!
That's a lot of turnover. a lot! Dunno if i've heard of that much before. My surge would dump around 7 gallons in my tank in around 20 seconds. That's some pretty high flow. It blew absolutely everything around, but it 6 minutes of not a lot of water movement. But I guaruntee you there were NO dead spots.