My tap water comes with +-10 nitrate so my tank is always between 20-40 even with 50% PWC
but i am way overfiltered i have a tetratec ex 700 and a 1200 so thats +-1900l/h and my tank is 250l
So i could leave one out easily
I would wana put something in the second filter to bring down the nitrates
Ive been reading quite a bit about plants, nitrate absorbing media like zeolith,...
Anyone that has experience with any of them?