I use the 20 to 1 bleach solution on all my new plants. I suffered a really bad case of ich 2 or 3 years ago now and I don't want to have snails of an unknown type with in my tanks. Nothing goes in my tanks without quarantine or treatment even stuff from my ponds.
I make about 1/2 a gallon of the solution, 1/2 a cup of bleach, 10 cups of water. I also fill a 5 gallon pail with water and water treatment solution at about 3 times the typical dosage. I use gloves because I always feel my hands are slippery with bleach if I don't use them but in reality it is the oils that have left my skin.
I use a countdown timer on my phone which I set to 2 minutes.
Process:
- Start countdown
- Add plant to bleach solution
- I gently agitate the plant in the solution, and try to get the solution on all parts
- When the timer goes immediately rinse the plant in about 75 f water rinsing it very thoroughly
- When you can no longer smell bleach on the plant put it in the solution of water treatment, gently agitate till fully covered by the solution.
- After about 15 minutes I do a second rinse and place in the tank
Some plants do not handle the treatment well but most do. I have had issues with some floaters, water lettuce in particular, so I only treat those for 1 to 1.5 minutes. On new plants I will sometimes take just a leaf and do a dry run, if the bleach adversely affects the plant they seem to become a bit "limper"?, in which case I use a smaller than 2 minute time. I also start the rinse immediately after the timer goes off.
I haven't had a plant die from this treatment though some might have been set back. I haven't killed a plant yet and some were pretty questionable before I started.
I have done this about 20 times both with store bought plants and plants collected from nearby bogs and ponds.
If at any time you can smell bleach or chlorine you haven't rinsed you plant good enough and it should not go in the tank.
I discovered the method some time ago on the net. Full discloser, I am not a very good chemist so I don't know if the water treatment helps with bleach. Perhaps one of our chemist members could speak to that.