san-ho-zay
Member
Just my update on this. I replaced the impellor with the 1000 and it makes a big difference. I can't say whether it's as much difference as replacing the whole pump but I'm pleased with the result. I've added a Koralia Nano too, but even without that the new impellor was moving the plants in the troublesome corner in front of the filter box, which the old one wasn't doing.