I've been running without skimmer or carbon now for a couple of months. I've only got the aerated waterfall and b.a.d.a.s.s. going. Now, I would expect some discolouration of the water (as I've experienced previously). However this is now not the case. My water has never been clearer. Curious to hear other folks experience regarding clarity and views as to if it's good or bad in their opinion.