PH refuses to go up!!

[Beverly]

Ah! Sealed room with little ventilation can cause low pH for sure.

To see how low O2 levels are in the room, aerate a glass of water in the room for 20 minutes, then aerate a glass of water outside for 20 minutes. Test pH before and after aerating. You can use tapwater or tankwater for this experiment. If there is a big difference in pH between the inside and outside experiments, you need better ventilation in your tankroom.