Thanks John.

Sorry to keep on, but just to get it right in my old head, my new mostly aquatic set-up with the new filter has been running now for a week or so. I was planning to clean the filter every two weeks as instructed on the box.

So am I correct in thinking that I can wait another 3 weeks or so before starting partial water changes, & how do I know how much poop the frogs are leaving.

What does frog poop look like, & is it always in the water?