Hope someone can help me with my precipitation problems. I see so many pics of aquariums with crystal clear water on this site. I am currently having a problem with precipitation in my tank. At first I thought it was microbubbles but now know better. I have tiny particles floating around in my water kind of makes it look like it is snowing. My tank is about 4 mths old right now. I use Reef Crystals for my sw mix. I always have some made up in advanced just in case of emergency. So when I do water changes the sw has been made up for probably a week and it is kept up at 79 degrees at 1.025sg. I do weekly 5 gallon water changes in my 29 gallon biocube. I do not dose with anything. I use purigen and chemipure elite with biomedia. Other than that no other chemicals or additives. My ammonia is 0, nitrates are 0, nitrites 0, ph is at 7.8, 11dkh hardness, and calcium is at 440ppm. My tank has live rock and live sand in it. Unfortunately I do not have a test kit for magnesium yet I will pick one up later on today. Does anyone know why I am having this problem and how I can make it stop. I also use ro/di water that I make myself and test with a tds meter. The meter reads 0 on my new water. Thanks for any help.