Help needed

Originally Posted by luigi545

Sometimes plants bought from LFS might have toxin subtances like pesticide etc that can wipe out your one or few at a time like your scenario progressively.
I believe there is a case like this mentioned before and sticked.
What plants did you introduce? Or perhaps your hands touch some toxin subtances before putting in tank?
It might be few causes imo.

Hi, suspected pesticide too and been running activated carbon since 2 weeks ago and changed 10% of water using distilled water every 3 days.
No additives, CO2 or plant fert added since the tank started except mosura mineral plus to increase the GH.

Lists of equipments are 1 XP3 cannister and i set of T5 lights.
Air pumps is off only when lights on
Just a simple setup