Just did a water change/test on my 40 gallon container pond. The ammonia and nitrite read at 0 ppm with nitrates at 5 ppm. I was using ammolock when i added water, but since there are also nitrates, i would say the water is cycled. (The pond has no filter) However, my pH is obscene at 8.4. All that's in the tub right now is my new fancy goldfish, some pond snails, and plants. I drained about 15 gallons and refilled it. During this, I found and made sure Petra (the goldfish) was okay. No signs of injury or disease. My tap water has a pH of about 7.5 I'm also fighting some green water What, if anything, should I do?