I've recently purchased a used 20gallon tank to move my betta into. The tank came with several pieces of used equipment that I have a few questions about. First, the tank came with an AquaClear 300 (now known as a 70). The flow rate even at it's lowest setting seems pretty high to me. Has anyone had success with this filter and a betta, or should I get something smaller?
Next, the light came with a white light tube and a black light tube. I haven't seen many references for black lights in fish tanks, so I'm left wondering what the advantage/disadvantage of either light would be.
Last, the tank came with a used bucket of sand. The people selling the tank said it was their daughter's equipment (who has since moved out of the house leaving her stuff behind) and they had no idea of the history of the stuff. Is the sand safe to use? Should I clean it before use? And on the topic of cleaning, is there anything special I should do when cleaning the tank itself, not knowing its history?