I had a 60 litre Cayman tank for a while, it might be different from the 'pro' though. It was a good quality tank and I thought the filter was very good (a blue wave 03/05). It had 2 sponges and 2 chambers with ceramic and plastic media and you could put more in the pump chamber. The main downside (with mine) was that water would trickle out of the feeding flap. I gave mine to my neighbour and its still going ok.