I'm setting up a new 75G tank, and over the weekend was mixing about a 100G of salt water...75G plus 29G sump...in 20 gallon batches. Maybe the RODI water I was mixing with the salt was too cold, but it seemed to mix well in the bin...I am using Seachem Reef Salt. Anyway, the tank has cleared significantly since yesterday, but is still hazy. There was a white "dust" over the inside of the glass and on the powerheads that I brushed off with an algae brush. I'm pretty sure it wasn't sand dust, as I rinsed the Aragonite very well before going into the tank. The water temp, when it was going into the tank, was about 66*, and now, since it's going through the heaters in the sump, is 76.3* Does it sound like I just didn't get the salt mixed well? When it warms up further do you think it will clear? Any other thoughts? Thanks.