Welcome to the forum JIm, good to know Coulter is not wiped out, i actually heard the same to-day, while i was at Swanswater.
I fished the main pond, and it's clearer than it was 2 or 3 weeks ago, they do however have a lot of filtering going on hay bales etc, the filtering appeared to be working very well.
We are due some wet spells, some heavy rain sunday and midweek, lets hope it refreshes the waters.
The fish are certainly still up for it at Swanswater i had 6 to-day, and they were certainly clean and fit, and do not appear to be affected at all.
Hope you're back and "intae" the brownies at Coulter real soon.
Best regards
Jim