Well, my lessons are the following, Make sure it is soaked when you install, but not algae covered, but soaked for a few days is good. I like fine bubbles vs, large so a valve to slowly add flow I recommend as well. A RENA 300 should do it, but again leaving it at the top of the tank. My Rena is 10+ years old. Olny cleaning or changing the air filter is all I have done and a bit of oiling, maybe twice.