I have used TropMarin, IO reef crystals, IO, Red Sea(both) and HW-Marinemix(both)in the past 20+years. I’ve had reefs good and bad, right now bad. Got some hair algae about a year and half ago. I can’t seem to totally get rid of it. Nothing seems to get rid of it so breaking tank down after Christmas and starting over. Back to the post, I have had the best results with HW-Marinemix Reefer and regular. I currently use HW Reefer. No preference between the two. Mixes quick and very clear in a very short time. Never thought to check it after mixing since I only change 5 gals at a time in my 90. I drip back over a 30 minute time frame. I don’t know the mix results and I will check on the next change. TropMarin is next favorite, then IO. I don’t care for RedSea at all. Mixes inconsistently and you can’t aerate for a long time, it precipitates a component in its mix. Algae problem seems to happen when I started using a combination of their products. Hopefully a coincidence.