Update:
Got the vertex installed on Wednesday. Working it in slowly like suggested, just 15 minutes the first day and doubling it each day. Still losing fish, lost 5 more blue cat today and a couple cnbg and a hsb. Also starting to lose fatheads. Hopefully after a week or so it will get cleared up. I talked with A&M and I'm going to send in a water sample next week. Hopefully it will start to take a turn in the right direction. Today was a hot one with no wind, so it made it twice as bad.