The ph at 6 is a little high but the ppm reading of your water is whats important. An easy remedy for this is to go to walmart and buy some distilled water. The ph of that stuff is around 5 so you will need to bump it up to 5.5-5.8 and the ppm reading is around 1-3. It was probably a combo of the heat and the water. Good luck bro -Diz:rasta: