Hello, I have a 75 gallon. Stocking: 2 platies 6 rummynose tetras 2 neon tetras(I had more but had a mass killing awhile ago. Just havent restocked). 3 glo fish. 3 kuhli loaches 6 amano shrimp, 15ish CRS I havent changed my water in a long time. Like over 1 month probably even 2 months. Ive been monitoring it every single day, no stressed fish, or acting werid, anything like that. I do have like 3 real plants in the tank. Their not too big, I dose ferts for them here and there. I tested my water today, thinking "Even tho everything looks great, tank is clear, no fish acting werid, it cant possibly still be okay, nitrates MUST be very high!" Turns out, my observations were correct. My water tested with 5ppm Nitrates. Ive asked my girlfriend to check the color, she said 5 aswell. These test are nowhere near expired, and I am sure I did the test correctly. How can this be? People say you NEED to change water every week or else nitrates will go nuts.. but mine is PERFECTLY fine. My theory is that i have the perfect amount of fish and plants, fish creating waste, and plants using the nitrates. What do you guys think?