SerMuncherIV wrote:It's just algae, it happens when you don't sterilize your planting media. It won't do anything to your plants unless they're young seedlings. However, it may be an indication that you're keeping the media a bit too wet.
Thank you! I was thinking it was some sort of mineral leaking into the soil or something like that. as my pots fell over in the greenhouse pot smashed everywhere including my cactus which has different soil mix. I had to use what was on the floor to replant my carnivorous plants. But there is abit of cacti soil mixed into the pots. I had to use as I had no more soil left. So I hope your right. It does look like algae.