I just bought the aqua clear 75. It is pretty nice. I have a 55g and it works great. I still have my two penguin 330s running, but will cut them out in about a month. I also put two 100 watt heaters in the wet dry. It barely fits in there with the pump, but my tank looks pretty sweet. I am hoping the guzzling noise going throught the pre filter will quiet down with time. Overall, its sweet and fits under my tank in the stand.