Algae and condensation issues as well as purple stem

Take dust sleeve off air scrubber. I took my scrubber out for better air flow. Your humidity is way too high in tent. 24/7 air flow needed. It needs to dry out. Will have to be cleaned with vinegar is a plant safe option. Remove plants and clean tent top. Keep grow space clean to keep critters out and disease. Replace plants leave door open till dry, then close again with fan inside going and air exchanger going.

Your light is evaporating and creating alot of humidity or If you have water sitting in the your tent, the ventilation fan should be taking care of this extra condensation. I doubt your carbon filter is stopping moisture. But possibly. You can put your filter on the outside of the tent so you know the fan is pulling the moisture out of the tent. Thats by best answer.

Thanks mate. What about the condensation issue

over saturates soil. If the top layer of soil never drys out, the stagnant water can grow algae. Over watering is your issue for purple stems, stress, and poor growth, let it dry out and water very lightly from here on out. Let it dry out every 1 - 2 days