Based on the readings in my test kit, i had 2 results each time. Does any one know the exact lighting i should use to allow me to read the results? With my refugium 5500k light, i get a reading of 8.8 and with my normal room light at the 3500k, i get 8.4.....wat should i base it on? I need to adjust my pH as soon as possible. I've been getting a pH of abougt 8.2 and out of nowhere it reads 8.4 but also 8.8 when i read it under the 5500k...any input would help guys thanks!! One more, how do i lower pH???