Hi all,
I have a 75g freshwater that is well planted (about 30). 9 various tetras, 4 corys, 2 netrite snails and 1 fiddler crab. My problem is the plants seem to be dieing and I lost 3 fish in the last 2 wks. Ammonia is 0 ppm, nitrite 0 ppm, nitrate 40 ppm. ph is 7.4. I live in the country and...