7 days ago, I did a 100% water change, and sprayed down the boulders and rocks. I didn't make any effort to get the backside of the rocks or clean the filter media, other than rinsing with pond water. We've had 2-3" of rain since. The water is back to being tea colored, but the Ph was 7.25, and ammonia, nitrites, and phosphate all came in at zero.
