I did this treatment yesterday.
75 gallon with substrate about 5" deep. I turned the filters off, added a powerhead, 2 large Sweetwater air stones and a 10" air "tube". I also used a large fish net to move water around during the 15 minutes.
I added 6 tbls. and a "splash" of peroxide for exactly 15 minutes and started doing the water change with a gravel cleaner hooked to a 3/4" hose which moves a lot of water. Once the water level was down 50%, I continued the water removal but started adding new water slowly. I probably drained about 75% of the water.
During the treatment, my Red Cherries were noticeably uncomfortable. They were swimming along the glass like they were trying to get out. I caught all of them, along with the Kulli Loaches and put them in a bowl. I did not remove the Vals.
Once the water change was complete, I added 6 caps of Excel. I have never used it before so I did the initial treatment. I put the Vals back in the tank because I thought they were sensitive to the peroxide.
I also put the shrimp and fish back.
To my knowledge, I have not lost any fish or shrimp and the Vals look awesome.
I see a noticeable difference in the hair algae but it is far from being gone. Do I need to give it more time or do another treatment?
Maybe I didn't use enough peroxide or Excel and figured too much displacement for the substrate?