If you want clear water, using activated carbon will polish it up. UV
sterilizers can accomplish things like this, especially with a bacteria bloom in the water column for example. The problem with our hobby grade UV
sterilizers is that they are small and not much water passes through them. Compare this to UV
sterilizers that are plumbed into home water lines. These are great due to all of the water coming into the home passes through the bulb.
This gets confusing when you then take into effect that increasing the GPH
through our hobby grade units isn't always the solution due to the water needing X amount of time in exposure to the UV
light to effectively kill off A,B,C, and D that is in the water 'mucking' it up to begin with.
Let us also not forget that there is also beneficial things in our water column as well. From small amounts of beneficial bacteria that assists with our nitrate cycle to pods
light doesn't care who or what it is...it will not survive exposure to the light.