I have an Azoo 4 fan unit that I no longer need since I have a chiller. This once sat on the back of my solana and kept the temp down. It works great! I included some pictures and even took one while it was on to show that all of the fans work. These sell for $40 online, asking $20 or tell me what you have to trade, I prefer maxi mini anemones or cool acan frags, but I am open to other offers.