JohnIII;711449 wrote: I let my tank run for about 9 months before I got my mandarin. I do use filter socks. That cheato I gave you should have a good population of pods. Hit your tank with a red light aftet the lights ate off for a couple hours and you will be able to see many pods. If you dont see any IMO thete ate not enough. They do sell live pods bagged though if you need them. Return pumps wont hurt them. Just shoot them to the dt like a extreme water slide.