It seems that due to Brexit Tropica have problems shipping to the UK and the plants that I have ordered will take longer to arrive, as a result I have started to consider other options.

In the past I bought plants from some of my local shops but then I had black snails in the tank, I have noticed them before they multiplied and got rid of them and obviously don't want them back.
Can I use Methylene Blue, Malachite Green or Formalin to kill them and any imported bacteria? Are these chemicals safe for the plants?

Thanks

I usually sterilise plants with potassium permanganate - just enough in a bucket to turn the water a pale pink. Soak for about 10 minutes and rinse thoroughly afterward. The other option is a bleach solution. Use cheap, thin household bleach with no other additives and dilute 1:20 with water. Soak plants for 10 minutes then rinse and soak in a bucket with a heavy dose of dechlorinator.

Thank you.