I've got both the 60 and the 70. Have kept the Juwel filter in both, does me and my plants ok, but have added a fluval external on the 70. The 60 is my species tank for phallichthys tico, keep it fairly heavily planted and heavily algaed to provide them with food, looks a right mess, but as long as they're happy. It's my bedroom tank so looks don't matter that much. The 70 is downstairs, gravel, bogwood and a couple of big Jave ferns and anubias, currently home to 3 corys, 3 young bristlies and a platy; eventually, I'll be shifting things around.