Cloudy saltwater mix

[Dale_M]

Need some advice...
I was going to do a 20% water change in my 20gal tomorrow. I have a Brute barrel with about 10 gal of saltwater mix circulating all week. There is a circulating pump at the bottom and about 8 ft of vinyl tubing attached. I arranged the tube so that its directed towards the surface to keep it stirred and give it some aeration. I checked it a couple times this week and it looked perfectly clear. Today I looked in the barrel and the water is all cloudy and everything in the barrel feels slimy. I have kept the cover on the barrel and its a tight fit.
So, my question is... Can I still use this water?
Should I test it? If so, what am I looking for?

 

[Mastiffsrule]

#WelcometoR2R

I saw in 17 you were tankless. Sounds like you might have a tank, want to share?

I attached brstv vid on you exact question. When you first mixed for a few days after it was clear. The longer it sit there precipitation and bacteria are occurring. Usually if I make water I uses it within 2 to 3 days. Somet8mes longer but with leaving the top open