I have a 180 gal tank that I tried dry traces in. I used Plantex CSM, and added Roach killer (1 to 12 ratio) for boron. It kept my plants alive, but my water started clouding up, and some plants just did not fare well - old growth would turn brown along with old stems. I used it in conjunction with KNO3, K2SO4, Epson Salt and Mono Potassium Sulfate. I even have a UV sterilizer hung on that tank, and whether it was on or off, the cloudiness wouldn’t go away OR get worse.
In the past few weeks I’ve gone back to using Flourish Traces and regular Flourish supplement, along with a dry Iron Chelate, and all seems better now. I still have some old growth turning brown, but not nearly as bad as with the dry taces.
Because dosing a 180 gal tank gets a little pricey, eventually I’ll have to experiment with it again. It seems that something is missing. When you read the Flourish ingredients, there are ten or so things in it that you don’t have in dry traces. Tom Barr would be one of the few people I know who might have an idea what these extra elements in Flourish are for.
I probably haven’t helped much, but this has been my experience.