And for those reading this, there is absolutely no reason for me to do this with the 7 pH calibration sample. 7 pH is 7pH at any temperature. I throw them both in to make sure I get the right one up to temp.
I don't mean to be insulting, but that's pretty weak logic.
If you don't even know what yours was, maybe it was just perfect to begin with. Does that imply everyone's will be?
pH is determined by the CO2 content of the water, and the carbonate alkalinity. Often, the CO2 level in the water is strongly impacted by the CO2 content in your home air. That varies tremendously. Homes with tighter sealing against air, and more CO2 sources (people, pets, gas stove, oven, etc.) will have much higher CO2.
pH is expected to have a substantial effect on the growth rate of hard corals. That growth rate matters more to some people than others.
I'm guessing your facility had plenty of air exchange, both into the tank and fresh air from outside. I feel the main reason hobbyists need to test pH regularly are due to changes in the CO2 content of our homes.
I’ve read that algae turf scrubbers use environmental CO2, so meaning CO2 from the air, and not directly uptaking CO2 from the water passing over the algae. I’m assuming that large environment probably had direct access to fresh air, and thus air for gas exchange was lower CO2, as compared to houses that are sealed for months on end.
I use to be one of those PH chasers and one day someone said to me “their are more important things to worry about” so needless to say I really don’t bother much with the PH. Yes, I check it and if I find it’s a bit low I open the slider next to the tank, open up the cabinet abit and open the top up. Wa la problem solved naturally. Works every time
