Awesome that you have a nano! I have a 10gal as well. I have also had a 14gal. I am no expert but there are some things that you need to disclose. How many fish do you have? What are they and what size are they? What are you feeding them (flakes,pellets)? How often are you feeding them and how much? Do you have any corals that you are feeding or should be feeding? How often and what are you feeding? When and if you do feed are you spot feeding? Count your snails dude. Here is the thing, you have a 10gal but in reality, it's more of an 8 gal as far as water goes. If you are going stock this tank with things that need to be fed, you need to religiously change 1gal every week. Or just get corals that love dirty water or tolerate it better. With a 10gal you should be able to look at the clarity of the water and condition of the corals and know what the problem is. Not saying you are doing it wrong, but a nano reef is a completely different ballgame than a larger system.