I've been to Lembeh and Bunaken twice (last time a year ago). Yes, I've also had ear infection issues there, but I have elsewhere too. I'm just getting over an ear infection - middle ear not just external from diving in Panama. Luckily it came on the day after I finished diving. Ear infections are very, very frustrating!
I have to agree with Luko. There is a lot of life in the water in Lembeh, including plankton and lots of things that are happy to thrive in warm damp conditions - like inside your ear.
As far as dirty goes - I don't think it's any worse than elsewhere in Asia. I remember being disgusted by the rubbish in that water in Bali - I don't remember Lembeh being as bad as Bali.
I have to agree with Luko. There is a lot of life in the water in Lembeh, including plankton and lots of things that are happy to thrive in warm damp conditions - like inside your ear.
As far as dirty goes - I don't think it's any worse than elsewhere in Asia. I remember being disgusted by the rubbish in that water in Bali - I don't remember Lembeh being as bad as Bali.