Hi
My tank has been running really smoothly and the last test has really worried me ammonia 0ppm Nitrite 0pmm Nitrate 20/40ppm
What do you think?
Why is this happening.
I have a 40lt tank with the following fish
3 Black Neon Tetra
2 Glow Light Tetra
2 platys
2 bronze corys
2 amano Shrimp...