Just use rainwater, man
SDK SLAYER Reviewed by SDK SLAYER on . Using aquarium water Would my aquarium water be good to feed to my special plants? It's a tropical aquarium about 160L big. I have been using it on various plants in my garden and it seems to have a good effect. From a home measuring strip thing: Nitrites: 0 Nitrates: 100 mg/L pH: 7.2 hardness: very hard! off the scale. Rating: 5