I have a quick question and/or need some advice... It appears the PH on a tank I'm cycling is low... At present I am reading 7.67 according to my apex. I have calabrated the apex 3 times to today to make sure its reading accurate. After each calibration i placed the probe back in the 7.0 and 10.0 PH solutions and the apex reads spot on at 7 and 10ph. If my tank was out of the initial cycle id start dosing Kalkwasser in my top off water but not sure how that would affect the cycle... Any thoughts or should i just ignore the PH until the cycle is over? Alkalinity and other promoters are all in check - only PH seems a bit low. On a side note before today i had been checking the PH with a redsea PH test kit and with that kit it was fine but i tend to believe the apex lab grade probe over a test kit esp when the lab probe is reading spot on in 3 different 7.0 and 10.0 test solutions. All the apex is doing is reading an electrical signal in the 7.0 and 10.0 solutions and then drawing a line through them so i have a hard time believe its an issue with a new probe. I will order a hanna PH tested for a 3rd source in the morning however.Anyhow any advice would be great.