I just dumped a pot because it got covered with a mix of mold and algae and some other green c@#&. It looked like this but 100x worse, with dark green dry patches and fluffy white mold everywhere:
It was one of my first pots and I did not wash and microwave the peat : perlite mix that it contained (now I try to wash and then microwave everything and avoid perlite whenever possible) So after about a month, the surface started to become green. First I tried to fight it with peroxide but it would always grow back. Neem oil ( extracts at 1%) did not help. And few days ago it started to smell..
So I was wondering if this happens again would it help to cover the soil with a layer (5mm) of coarse sand to suffocate the algae/fungus/and whatever else grows there.
I currently have Butterwort, VFT's, Sarracenia, and Droseras will these plants tolerate a top layer of sand on their soil?