Vanda overnight soaks - add physan

[guccisimo85]

I’ve started soaking all 8 of my vandas overnight in a single 10 gallon container. I add fertilizer at 1/4 strength and reuse the water for a few days before swapping it out. I am a little worried about anything growing in there, but it would be a hassle and waste of fertilizer to change the water daily. Do you think it would be effective / cause any issues if I add a very small amount of physan 20 to the water? I’m thinking a 200ppm dilution

I’ve used it as a foliar spray and they reacted fine, but I’ve never soaked their roots in it overnight. Some of their leaves inevitably end up underwater as well, so I thought this might prevent any issues in that respect too.

Thanks!