Viewing post #380903 by KAMasud

Pure Oxygen is bacteriostatic and anti fungal. I have seen those kind of marks plus you are showing it as a hanging pot in full blush of green. First I thought they were friction marks but then I see it on your other pots. Also those marks are now calloused which to me at least says whatever happened is past.
Give them your tried and tested strength of dowsing with hydrogen peroxide, no harm plus the roots also will be happy in oxygenated soil. I don't know what the percentage strength of it you have because there are two available. One is a weak one for washing minor wounds another is 40% which ladies use to do wonderful things with their hair don't ask me what and why. I use the 40%.
I have indoor plants, just never got around to showing them. Palms also start showing those kind of marks plus something else which I don't remember off hand, must be that Liana Stefflaria. Indoors is a unnatural harsh environment for plants. Cooking fats, steam, tobacco smoke, perfumes the list is never ending. These fats, either cooking or what we breath out(Ever wonder what that film on the window panes is which you clean with great difficulty ) choke the fine pores of plants which leads to tissue death. I don't know what you will do with that hanging one but the rest you can put out in the rain for a good wash and then can be brought back in.
Regards,
Arif.