Hello, I'm a newbie and have been reading all I can about aquarium water and fish, etc. Your site has been tremendously educational and members so helpful. Now that I have been trying to really understand about water parameters, I have delved into the different water categories. I have read the section of the forum regarding
pH, but I am not quite sure I can apply all that information yet. My pH has slowly been going down, today, it is 6.0 (I don't know if it could be lower since the chart only goes to 6.0). My
ammonia is .25,
nitrite .25 and
nitrate 0. I don't know for sure what stage my cycle is in, but I think it is cycling well. Fish are very healthy looking and no fish losses since I first set up the tank. Sometimes I notice a "funky" smell on the surface of the water and now I'm wondering if it's the gas smell

? I've read about adding crushed coarl and baking soda, but I'm reluctant to do so until I can try to determine WHY my pH is getting lower. Anyway, I worry that my pH will drop even more. Any ideas?