Possibly.... what depth are your beds... and what media....
Oh, and what's your pH reading??
Our temperature ranges are a real problem. The water clarity issue started showing up when temperatures were still relatively stable in the summer band, but we swing from 32 degrees at night in winter, to over 105 in summer. My water temp in summer hovers between 73 and 90, while right not it is between 60 and 70 - the nights are cooling down but the days are still very hot.
I really think that the otside system was starting to show a shift to a pattern where the fines were no longer getting stuck in the gravel, and the plant roots maybe creating "pathes" in the beds for the water in stead of it having access to the whole empty gravel bed before. I see in Dr Lennards calculator text is a recommendation that gravel beds get a quick flush every 6 months to a year. I'm considering doing that as I replace plants in some of the beds just to see if it makes a difference.
I also had some pH issues, but took at least a month to gradually lift it from around 6.4 to where it is now.